25297985 has 16 divisors (see below), whose sum is σ = 31401216. Its totient is φ = 19554048.

The previous prime is 25297969. The next prime is 25297991. The reversal of 25297985 is 58979252.

It is a cyclic number.

It is not a de Polignac number, because 25297985 - 2⁴ = 25297969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18857 + ... + 20153.

It is an arithmetic number, because the mean of its divisors is an integer number (1962576).

Almost surely, 2^25297985 is an apocalyptic number.

It is an amenable number.

25297985 is a deficient number, since it is larger than the sum of its proper divisors (6103231).

25297985 is a wasteful number, since it uses less digits than its factorization.

25297985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its digits is 453600, while the sum is 47.

The square root of 25297985 is about 5029.7102302220. The cubic root of 25297985 is about 293.5589395875.

The spelling of 25297985 in words is "twenty-five million, two hundred ninety-seven thousand, nine hundred eighty-five".