25561026 has 12 divisors (see below), whose sum is σ = 55382262. Its totient is φ = 8520336.

The previous prime is 25561009. The next prime is 25561031. The reversal of 25561026 is 62016552.

25561026 is a `hidden beast` number, since 2 + 556 + 102 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19316025 + 6245001 = 4395^2 + 2499^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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, 710011 + ... + 710046.

Almost surely, 2^25561026 is an apocalyptic number.

25561026 is an abundant number, since it is smaller than the sum of its proper divisors (29821236).

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

25561026 is a wasteful number, since it uses less digits than its factorization.

25561026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420065 (or 1420062 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25561026 is about 5055.7913327193. The cubic root of 25561026 is about 294.5728799234.

Adding to 25561026 its reverse (62016552), we get a palindrome (87577578).

The spelling of 25561026 in words is "twenty-five million, five hundred sixty-one thousand, twenty-six".