15979642 has 16 divisors (see below), whose sum is σ = 27605952. Its totient is φ = 6795360.

The previous prime is 15979637. The next prime is 15979661. The reversal of 15979642 is 24697951.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2523 + ... + 6190.

It is an arithmetic number, because the mean of its divisors is an integer number (1725372).

Almost surely, 2^15979642 is an apocalyptic number.

15979642 is a deficient number, since it is larger than the sum of its proper divisors (11626310).

15979642 is a wasteful number, since it uses less digits than its factorization.

15979642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853.

The product of its digits is 136080, while the sum is 43.

The square root of 15979642 is about 3997.4544400155. The cubic root of 15979642 is about 251.8772918164.

The spelling of 15979642 in words is "fifteen million, nine hundred seventy-nine thousand, six hundred forty-two".