25498865 has 24 divisors (see below), whose sum is σ = 35841600. Its totient is φ = 17363808.

The previous prime is 25498853. The next prime is 25498873. The reversal of 25498865 is 56889452.

It is not a de Polignac number, because 25498865 - 2⁸ = 25498609 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 48494 + ... + 49016.

It is an arithmetic number, because the mean of its divisors is an integer number (1493400).

Almost surely, 2^25498865 is an apocalyptic number.

It is an amenable number.

25498865 is a deficient number, since it is larger than the sum of its proper divisors (10342735).

25498865 is a wasteful number, since it uses less digits than its factorization.

25498865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 734 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 25498865 is about 5049.6400861844. The cubic root of 25498865 is about 294.3338987999. Note that the first 3 decimals are identical.

The spelling of 25498865 in words is "twenty-five million, four hundred ninety-eight thousand, eight hundred sixty-five".