15421253 has 2 divisors, whose sum is σ = 15421254. Its totient is φ = 15421252.

The previous prime is 15421249. The next prime is 15421277. The reversal of 15421253 is 35212451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8567329 + 6853924 = 2927^2 + 2618^2 .

It is a cyclic number.

It is not a de Polignac number, because 15421253 - 2² = 15421249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15421213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710626 + 7710627.

It is an arithmetic number, because the mean of its divisors is an integer number (7710627).

Almost surely, 2^15421253 is an apocalyptic number.

It is an amenable number.

15421253 is a deficient number, since it is larger than the sum of its proper divisors (1).

15421253 is an equidigital number, since it uses as much as digits as its factorization.

15421253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 23.

The square root of 15421253 is about 3926.9903233902. The cubic root of 15421253 is about 248.9085915776.

The spelling of 15421253 in words is "fifteen million, four hundred twenty-one thousand, two hundred fifty-three".