25670565 has 24 divisors (see below), whose sum is σ = 44962008. Its totient is φ = 13547520.

The previous prime is 25670543. The next prime is 25670611. The reversal of 25670565 is 56507652.

25670565 is a `hidden beast` number, since 25 + 6 + 70 + 565 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5447556 + 20223009 = 2334^2 + 4497^2 .

It is not a de Polignac number, because 25670565 - 2¹⁵ = 25637797 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1425 + ... + 7305.

It is an arithmetic number, because the mean of its divisors is an integer number (1873417).

Almost surely, 2^25670565 is an apocalyptic number.

It is an amenable number.

25670565 is a deficient number, since it is larger than the sum of its proper divisors (19291443).

25670565 is a wasteful number, since it uses less digits than its factorization.

25670565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5989 (or 5986 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 25670565 is about 5066.6127738362. The cubic root of 25670565 is about 294.9930669634.

The spelling of 25670565 in words is "twenty-five million, six hundred seventy thousand, five hundred sixty-five".