25915970 has 16 divisors (see below), whose sum is σ = 46727928. Its totient is φ = 10348800.

The previous prime is 25915961. The next prime is 25915987. The reversal of 25915970 is 7951952.

It can be written as a sum of positive squares in 4 ways, for example, as 19918369 + 5997601 = 4463^2 + 2449^2 .

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 7 ways as a sum of consecutive naturals, for example, 5162 + ... + 8858.

Almost surely, 2^25915970 is an apocalyptic number.

25915970 is a deficient number, since it is larger than the sum of its proper divisors (20811958).

25915970 is a wasteful number, since it uses less digits than its factorization.

25915970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 25915970 is about 5090.7730257791. The cubic root of 25915970 is about 295.9301104169.

The spelling of 25915970 in words is "twenty-five million, nine hundred fifteen thousand, nine hundred seventy".