25461665 has 16 divisors (see below), whose sum is σ = 32814720. Its totient is φ = 18896640.

The previous prime is 25461649. The next prime is 25461671. The reversal of 25461665 is 56616452.

It is not a de Polignac number, because 25461665 - 2⁴ = 25461649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3926 + ... + 8144.

It is an arithmetic number, because the mean of its divisors is an integer number (2050920).

Almost surely, 2^25461665 is an apocalyptic number.

It is an amenable number.

25461665 is a deficient number, since it is larger than the sum of its proper divisors (7353055).

25461665 is a wasteful number, since it uses less digits than its factorization.

25461665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312.

The product of its digits is 43200, while the sum is 35.

The square root of 25461665 is about 5045.9553109396. The cubic root of 25461665 is about 294.1906956950.

The spelling of 25461665 in words is "twenty-five million, four hundred sixty-one thousand, six hundred sixty-five".