25871520 has 48 divisors (see below), whose sum is σ = 81496800. Its totient is φ = 6898944.

The previous prime is 25871513. The next prime is 25871543. The reversal of 25871520 is 2517852.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×25871520² = 1338671094220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 26470 + ... + 27429.

It is an arithmetic number, because the mean of its divisors is an integer number (1697850).

Almost surely, 2^25871520 is an apocalyptic number.

25871520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25871520 is an abundant number, since it is smaller than the sum of its proper divisors (55625280).

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

25871520 is a wasteful number, since it uses less digits than its factorization.

25871520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53917 (or 53909 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25871520 is about 5086.4054105036. The cubic root of 25871520 is about 295.7608245668.

The spelling of 25871520 in words is "twenty-five million, eight hundred seventy-one thousand, five hundred twenty".