25512520 has 64 divisors (see below), whose sum is σ = 65370240. Its totient is φ = 8870400.

The previous prime is 25512517. The next prime is 25512521. The reversal of 25512520 is 2521552.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 25512491 and 25512500.

It is not an unprimeable number, because it can be changed into a prime (25512521) 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, 8860 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (1021410).

Almost surely, 2^25512520 is an apocalyptic number.

25512520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25512520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32685120).

25512520 is an abundant number, since it is smaller than the sum of its proper divisors (39857720).

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

25512520 is a wasteful number, since it uses less digits than its factorization.

25512520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 2562 counting only the distinct ones).

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

The square root of 25512520 is about 5050.9919817794. The cubic root of 25512520 is about 294.3864294016.

The spelling of 25512520 in words is "twenty-five million, five hundred twelve thousand, five hundred twenty".