25918497 has 24 divisors (see below), whose sum is σ = 41277600. Its totient is φ = 15540480.

The previous prime is 25918483. The next prime is 25918499. The reversal of 25918497 is 79481952.

It is not a de Polignac number, because 25918497 - 2⁶ = 25918433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25918499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8254 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^25918497 is an apocalyptic number.

It is an amenable number.

25918497 is a deficient number, since it is larger than the sum of its proper divisors (15359103).

25918497 is a wasteful number, since it uses less digits than its factorization.

25918497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813 (or 2810 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 25918497 is about 5091.0212138627. The cubic root of 25918497 is about 295.9397285672.

The spelling of 25918497 in words is "twenty-five million, nine hundred eighteen thousand, four hundred ninety-seven".