25560381 has 16 divisors (see below), whose sum is σ = 42490368. Its totient is φ = 13278000.

The previous prime is 25560349. The next prime is 25560389. The reversal of 25560381 is 18306552.

It is not a de Polignac number, because 25560381 - 2⁵ = 25560349 is a prime.

It is a super-2 number, since 2×25560381² = 1306666153730322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25560389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55095 + ... + 55556.

It is an arithmetic number, because the mean of its divisors is an integer number (2655648).

Almost surely, 2^25560381 is an apocalyptic number.

25560381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25560381 is a deficient number, since it is larger than the sum of its proper divisors (16929987).

25560381 is a wasteful number, since it uses less digits than its factorization.

25560381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110672.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 25560381 is about 5055.7275440830. The cubic root of 25560381 is about 294.5704021785.

The spelling of 25560381 in words is "twenty-five million, five hundred sixty thousand, three hundred eighty-one".