25215980 has 12 divisors (see below), whose sum is σ = 52953600. Its totient is φ = 10086384.

The previous prime is 25215979. The next prime is 25215991. The reversal of 25215980 is 8951252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630380 + ... + 630419.

It is an arithmetic number, because the mean of its divisors is an integer number (4412800).

Almost surely, 2^25215980 is an apocalyptic number.

25215980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25215980 is an abundant number, since it is smaller than the sum of its proper divisors (27737620).

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

25215980 is a wasteful number, since it uses less digits than its factorization.

25215980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260808 (or 1260806 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 25215980 is about 5021.5515530561. The cubic root of 25215980 is about 293.2413996795.

The spelling of 25215980 in words is "twenty-five million, two hundred fifteen thousand, nine hundred eighty".