25045881 has 16 divisors (see below), whose sum is σ = 38246784. Its totient is φ = 14281344.

The previous prime is 25045871. The next prime is 25045883. The reversal of 25045881 is 18854052.

It is not a de Polignac number, because 25045881 - 2¹¹ = 25043833 is a prime.

It is a super-2 number, since 2×25045881² = 1254592310132322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25045883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11991 + ... + 13923.

It is an arithmetic number, because the mean of its divisors is an integer number (2390424).

Almost surely, 2^25045881 is an apocalyptic number.

25045881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25045881 is a deficient number, since it is larger than the sum of its proper divisors (13200903).

25045881 is a wasteful number, since it uses less digits than its factorization.

25045881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 25045881 is about 5004.5859968633. The cubic root of 25045881 is about 292.5805403165.

It can be divided in two parts, 2504 and 5881, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 25045881 in words is "twenty-five million, forty-five thousand, eight hundred eighty-one".