15980625 has 40 divisors (see below), whose sum is σ = 29615520. Its totient is φ = 8514000.

The previous prime is 15980623. The next prime is 15980651. The reversal of 15980625 is 52608951.

It is a happy number.

15980625 is a `hidden beast` number, since 1 + 598 + 0 + 62 + 5 = 666.

It is not a de Polignac number, because 15980625 - 2¹ = 15980623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15980625.

It is not an unprimeable number, because it can be changed into a prime (15980621) 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 39 ways as a sum of consecutive naturals, for example, 16402 + ... + 17348.

It is an arithmetic number, because the mean of its divisors is an integer number (740388).

Almost surely, 2^15980625 is an apocalyptic number.

15980625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15980625 is a deficient number, since it is larger than the sum of its proper divisors (13634895).

15980625 is an frugal number, since it uses more digits than its factorization.

15980625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 15980625 is about 3997.5773913709. The cubic root of 15980625 is about 251.8824565191.

The spelling of 15980625 in words is "fifteen million, nine hundred eighty thousand, six hundred twenty-five".