25397915 has 8 divisors (see below), whose sum is σ = 32270400. Its totient is φ = 19123072.

The previous prime is 25397909. The next prime is 25397921. The reversal of 25397915 is 51979352.

It is an interprime number because it is at equal distance from previous prime (25397909) and next prime (25397921).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25397915 - 2¹⁶ = 25332379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149315 + ... + 149484.

It is an arithmetic number, because the mean of its divisors is an integer number (4033800).

Almost surely, 2^25397915 is an apocalyptic number.

25397915 is a deficient number, since it is larger than the sum of its proper divisors (6872485).

25397915 is a wasteful number, since it uses less digits than its factorization.

25397915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298821.

The product of its digits is 85050, while the sum is 41.

The square root of 25397915 is about 5039.6344113437. The cubic root of 25397915 is about 293.9449624712.

The spelling of 25397915 in words is "twenty-five million, three hundred ninety-seven thousand, nine hundred fifteen".