25740585 has 40 divisors (see below), whose sum is σ = 49701960. Its totient is φ = 12669696.

The previous prime is 25740581. The next prime is 25740587. The reversal of 25740585 is 58504752.

It is a happy number.

25740585 is a `hidden beast` number, since 2 + 5 + 74 + 0 + 585 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1327104 + 24413481 = 1152^2 + 4941^2 .

It is not a de Polignac number, because 25740585 - 2² = 25740581 is a prime.

It is a super-2 number, since 2×25740585² = 1325155432284450, which contains 22 as substring.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (25740581) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2821 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (1242549).

Almost surely, 2^25740585 is an apocalyptic number.

It is an amenable number.

25740585 is a deficient number, since it is larger than the sum of its proper divisors (23961375).

25740585 is a wasteful number, since it uses less digits than its factorization.

25740585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919 (or 4910 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 25740585 is about 5073.5180102174. The cubic root of 25740585 is about 295.2610348713.

The spelling of 25740585 in words is "twenty-five million, seven hundred forty thousand, five hundred eighty-five".