25961504 has 12 divisors (see below), whose sum is σ = 51111774. Its totient is φ = 12980736.

The previous prime is 25961497. The next prime is 25961521. The reversal of 25961504 is 40516952.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 2729104 = 4820^2 + 1652^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 811297 = 25961504 / (2 + 5 + 9 + 6 + 1 + 5 + 0 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405617 + ... + 405680.

Almost surely, 2^25961504 is an apocalyptic number.

It is an amenable number.

25961504 is a deficient number, since it is larger than the sum of its proper divisors (25150270).

25961504 is an equidigital number, since it uses as much as digits as its factorization.

25961504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811307 (or 811299 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 25961504 is about 5095.2432719155. The cubic root of 25961504 is about 296.1033240456.

The spelling of 25961504 in words is "twenty-five million, nine hundred sixty-one thousand, five hundred four".