25425864 has 24 divisors (see below), whose sum is σ = 68861910. Its totient is φ = 8475264.

The previous prime is 25425853. The next prime is 25425871. The reversal of 25425864 is 46852452.

It is a happy number.

25425864 is a `hidden beast` number, since 2 + 542 + 58 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 4796100 = 4542^2 + 2190^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176497 + ... + 176640.

Almost surely, 2^25425864 is an apocalyptic number.

25425864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25425864 is an abundant number, since it is smaller than the sum of its proper divisors (43436046).

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

25425864 is a wasteful number, since it uses less digits than its factorization.

25425864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353149 (or 353142 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 25425864 is about 5042.4065682965. The cubic root of 25425864 is about 294.0527463324.

The spelling of 25425864 in words is "twenty-five million, four hundred twenty-five thousand, eight hundred sixty-four".