25420560 has 80 divisors (see below), whose sum is σ = 85976640. Its totient is φ = 6161920.

The previous prime is 25420531. The next prime is 25420579. The reversal of 25420560 is 6502452.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25420560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2175 + ... + 7454.

It is an arithmetic number, because the mean of its divisors is an integer number (1074708).

Almost surely, 2^25420560 is an apocalyptic number.

25420560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25420560 is an abundant number, since it is smaller than the sum of its proper divisors (60556080).

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

25420560 is a wasteful number, since it uses less digits than its factorization.

25420560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9656 (or 9650 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25420560 is about 5041.8806015216. The cubic root of 25420560 is about 294.0322978077.

The spelling of 25420560 in words is "twenty-five million, four hundred twenty thousand, five hundred sixty".