13897251 has 10 divisors (see below), whose sum is σ = 20760212. Its totient is φ = 9264780.

The previous prime is 13897243. The next prime is 13897253. The reversal of 13897251 is 15279831.

It is not a de Polignac number, because 13897251 - 2³ = 13897243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13897253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85705 + ... + 85866.

Almost surely, 2^13897251 is an apocalyptic number.

13897251 is a deficient number, since it is larger than the sum of its proper divisors (6862961).

13897251 is an equidigital number, since it uses as much as digits as its factorization.

13897251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171583 (or 171574 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13897251 is about 3727.9016886179. The cubic root of 13897251 is about 240.4231597109.

The spelling of 13897251 in words is "thirteen million, eight hundred ninety-seven thousand, two hundred fifty-one".