25897617 has 16 divisors (see below), whose sum is σ = 39605760. Its totient is φ = 16707600.

The previous prime is 25897607. The next prime is 25897631. The reversal of 25897617 is 71679852.

25897617 is a `hidden beast` number, since 2 + 589 + 7 + 61 + 7 = 666.

25897617 is nontrivially palindromic in base 13.

It is a de Polignac number, because none of the positive numbers 2^k-25897617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25897607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14634 + ... + 16307.

It is an arithmetic number, because the mean of its divisors is an integer number (2475360).

Almost surely, 2^25897617 is an apocalyptic number.

25897617 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25897617 is a deficient number, since it is larger than the sum of its proper divisors (13708143).

25897617 is a wasteful number, since it uses less digits than its factorization.

25897617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30981 (or 30975 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 25897617 is about 5088.9701315689. The cubic root of 25897617 is about 295.8602373116.

The spelling of 25897617 in words is "twenty-five million, eight hundred ninety-seven thousand, six hundred seventeen".