25504985 has 12 divisors (see below), whose sum is σ = 33642084. Its totient is φ = 18548640.

The previous prime is 25504979. The next prime is 25504991. The reversal of 25504985 is 58940552.

It is an interprime number because it is at equal distance from previous prime (25504979) and next prime (25504991).

It can be written as a sum of positive squares in 2 ways, for example, as 6911641 + 18593344 = 2629^2 + 4312^2 .

It is not a de Polignac number, because 25504985 - 2²⁰ = 24456409 is a prime.

It is a Duffinian number.

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, 20474 + ... + 21683.

It is an arithmetic number, because the mean of its divisors is an integer number (2803507).

Almost surely, 2^25504985 is an apocalyptic number.

It is an amenable number.

25504985 is a deficient number, since it is larger than the sum of its proper divisors (8137099).

25504985 is a wasteful number, since it uses less digits than its factorization.

25504985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42184 (or 42173 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 25504985 is about 5050.2460336106. The cubic root of 25504985 is about 294.3574446762.

The spelling of 25504985 in words is "twenty-five million, five hundred four thousand, nine hundred eighty-five".