25564465 has 12 divisors (see below), whose sum is σ = 31018356. Its totient is φ = 20226528.

The previous prime is 25564459. The next prime is 25564471. The reversal of 25564465 is 56446552.

It is an interprime number because it is at equal distance from previous prime (25564459) and next prime (25564471).

It can be written as a sum of positive squares in 2 ways, for example, as 4661281 + 20903184 = 2159^2 + 4572^2 .

It is not a de Polignac number, because 25564465 - 2⁵ = 25564433 is a prime.

It is a Duffinian number.

Its product of digits (144000) is a multiple of the sum of its prime factors (576).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80487 + ... + 80803.

It is an arithmetic number, because the mean of its divisors is an integer number (2584863).

Almost surely, 2^25564465 is an apocalyptic number.

It is an amenable number.

25564465 is a deficient number, since it is larger than the sum of its proper divisors (5453891).

25564465 is an equidigital number, since it uses as much as digits as its factorization.

25564465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 449 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 25564465 is about 5056.1314262982. The cubic root of 25564465 is about 294.5860900178.

It can be divided in two parts, 2556 and 4465, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 25564465 in words is "twenty-five million, five hundred sixty-four thousand, four hundred sixty-five".