25125520 has 40 divisors (see below), whose sum is σ = 66763584. Its totient is φ = 8614272.

The previous prime is 25125491. The next prime is 25125523. The reversal of 25125520 is 2552152.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 25125491 and 25125500.

It is not an unprimeable number, because it can be changed into a prime (25125523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21874 + ... + 22993.

Almost surely, 2^25125520 is an apocalyptic number.

25125520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25125520 is an abundant number, since it is smaller than the sum of its proper divisors (41638064).

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

25125520 is a wasteful number, since it uses less digits than its factorization.

25125520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44887 (or 44881 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 25125520 is about 5012.5362841580. The cubic root of 25125520 is about 292.8903207079.

Adding to 25125520 its reverse (2552152), we get a palindrome (27677672).

The spelling of 25125520 in words is "twenty-five million, one hundred twenty-five thousand, five hundred twenty".