1453

This number is a prime.

There is no need to factor the time 14:53.

The sum of all of the 3-digit palindromic primes that are not the sum of consecutive composite numbers (1453 = 313 + 383 + 757). Note that 1453 is also an emirp. [Loungrides]

The fall of Constantinople to the Ottomans occurred on May 29, 1453. Note that the numbers 5, (May is the 5th month), 29, 1453 as well as their concatenation in order, i.e., 5291453 are all primes. [Loungrides]

The largest prime (emirp) that can be represented as sum of a 3-digit prime and its reversal in two ways, i.e., 1453 = 479+974 = 677+776. [Loungrides]

The 1453rd prime palindrome (145353541) starts with 1453. [Gaydos]