15980975 has 12 divisors (see below), whose sum is σ = 20678736. Its totient is φ = 12228480.

The previous prime is 15980971. The next prime is 15980981. The reversal of 15980975 is 57908951.

It is a happy number.

It is not a de Polignac number, because 15980975 - 2² = 15980971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15980971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13322 + ... + 14471.

It is an arithmetic number, because the mean of its divisors is an integer number (1723228).

Almost surely, 2^15980975 is an apocalyptic number.

15980975 is a deficient number, since it is larger than the sum of its proper divisors (4697761).

15980975 is a wasteful number, since it uses less digits than its factorization.

15980975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27826 (or 27821 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 15980975 is about 3997.6211676446. The cubic root of 15980975 is about 251.8842953754.

The spelling of 15980975 in words is "fifteen million, nine hundred eighty thousand, nine hundred seventy-five".