25561260 has 36 divisors (see below), whose sum is σ = 77536368. Its totient is φ = 6816288.

The previous prime is 25561253. The next prime is 25561297. The reversal of 25561260 is 6216552.

It is a tau number, because it is divible by the number of its divisors (36).

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, 70824 + ... + 71183.

It is an arithmetic number, because the mean of its divisors is an integer number (2153788).

Almost surely, 2^25561260 is an apocalyptic number.

25561260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25561260 is an abundant number, since it is smaller than the sum of its proper divisors (51975108).

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

25561260 is a wasteful number, since it uses less digits than its factorization.

25561260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142022 (or 142017 counting only the distinct ones).

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

The square root of 25561260 is about 5055.8144744443. The cubic root of 25561260 is about 294.5737788159.

The spelling of 25561260 in words is "twenty-five million, five hundred sixty-one thousand, two hundred sixty".