13015986 has 8 divisors (see below), whose sum is σ = 26031984. Its totient is φ = 4338660.

The previous prime is 13015979. The next prime is 13015991. The reversal of 13015986 is 68951031.

It is a sphenic number, since it is the product of 3 distinct primes.

13015986 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1084660 + ... + 1084671.

It is an arithmetic number, because the mean of its divisors is an integer number (3253998).

Almost surely, 2^13015986 is an apocalyptic number.

13015986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13015986 is a wasteful number, since it uses less digits than its factorization.

13015986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169336.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 13015986 is about 3607.7674537032. The cubic root of 13015986 is about 235.2298098988.

The spelling of 13015986 in words is "thirteen million, fifteen thousand, nine hundred eighty-six".