15716985 has 16 divisors (see below), whose sum is σ = 26015040. Its totient is φ = 8093120.

The previous prime is 15716983. The next prime is 15716989. The reversal of 15716985 is 58961751.

It is not a de Polignac number, because 15716985 - 2¹ = 15716983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15716983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17631 + ... + 18500.

It is an arithmetic number, because the mean of its divisors is an integer number (1625940).

Almost surely, 2^15716985 is an apocalyptic number.

15716985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15716985 is a deficient number, since it is larger than the sum of its proper divisors (10298055).

15716985 is a wasteful number, since it uses less digits than its factorization.

15716985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36168.

The product of its digits is 75600, while the sum is 42.

The square root of 15716985 is about 3964.4652855082. The cubic root of 15716985 is about 250.4896271018.

The spelling of 15716985 in words is "fifteen million, seven hundred sixteen thousand, nine hundred eighty-five".