25520570 has 64 divisors (see below), whose sum is σ = 52068096. Its totient is φ = 8954880.

The previous prime is 25520569. The next prime is 25520597. The reversal of 25520570 is 7502552.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238457 + ... + 238563.

It is an arithmetic number, because the mean of its divisors is an integer number (813564).

Almost surely, 2^25520570 is an apocalyptic number.

25520570 is an abundant number, since it is smaller than the sum of its proper divisors (26547526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25520570 is a wasteful number, since it uses less digits than its factorization.

25520570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 25520570 is about 5051.7887921013. The cubic root of 25520570 is about 294.4173888619.

The spelling of 25520570 in words is "twenty-five million, five hundred twenty thousand, five hundred seventy".