25013569 has 6 divisors (see below), whose sum is σ = 29097474. Its totient is φ = 21440160.

The previous prime is 25013563. The next prime is 25013587. The reversal of 25013569 is 96531052.

It can be written as a sum of positive squares in only one way, i.e., 24354225 + 659344 = 4935^2 + 812^2 .

It is not a de Polignac number, because 25013569 - 2³ = 25013561 is a prime.

It is a super-2 number, since 2×25013569² = 1251357268235522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25013569.

It is not an unprimeable number, because it can be changed into a prime (25013561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255192 + ... + 255289.

It is an arithmetic number, because the mean of its divisors is an integer number (4849579).

Almost surely, 2^25013569 is an apocalyptic number.

It is an amenable number.

25013569 is a deficient number, since it is larger than the sum of its proper divisors (4083905).

25013569 is an equidigital number, since it uses as much as digits as its factorization.

25013569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510495 (or 510488 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 25013569 is about 5001.3567159322. The cubic root of 25013569 is about 292.4546655822.

The spelling of 25013569 in words is "twenty-five million, thirteen thousand, five hundred sixty-nine".