25656434 has 16 divisors (see below), whose sum is σ = 41310648. Its totient is φ = 11907072.

The previous prime is 25656409. The next prime is 25656443. The reversal of 25656434 is 43465652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19775809 + 5880625 = 4447^2 + 2425^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25656394 and 25656403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687 + ... + 7650.

Almost surely, 2^25656434 is an apocalyptic number.

25656434 is a deficient number, since it is larger than the sum of its proper divisors (15654214).

25656434 is a wasteful number, since it uses less digits than its factorization.

25656434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10429.

The product of its digits is 86400, while the sum is 35.

The square root of 25656434 is about 5065.2180604590. The cubic root of 25656434 is about 294.9389282750.

The spelling of 25656434 in words is "twenty-five million, six hundred fifty-six thousand, four hundred thirty-four".