15976 has 8 divisors (see below), whose sum is σ = 29970. Its totient is φ = 7984.

The previous prime is 15973. The next prime is 15991. The reversal of 15976 is 67951.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15876 + 100 = 126^2 + 10^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991 + ... + 1006.

2¹⁵⁹⁷⁶ is an apocalyptic number.

It is an amenable number.

15976 is a deficient number, since it is larger than the sum of its proper divisors (13994).

15976 is a wasteful number, since it uses less digits than its factorization.

15976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003 (or 1999 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 15976 is about 126.3962024746. The cubic root of 15976 is about 25.1858154825.

The spelling of 15976 in words is "fifteen thousand, nine hundred seventy-six".