13986515 has 4 divisors (see below), whose sum is σ = 16783824. Its totient is φ = 11189208.

The previous prime is 13986509. The next prime is 13986547. The reversal of 13986515 is 51568931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51568931 = 29 ⋅1778239.

It is a cyclic number.

It is not a de Polignac number, because 13986515 - 2⁴ = 13986499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398647 + ... + 1398656.

It is an arithmetic number, because the mean of its divisors is an integer number (4195956).

Almost surely, 2^13986515 is an apocalyptic number.

13986515 is a deficient number, since it is larger than the sum of its proper divisors (2797309).

13986515 is an equidigital number, since it uses as much as digits as its factorization.

13986515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797308.

The product of its digits is 32400, while the sum is 38.

The square root of 13986515 is about 3739.8549437111. The cubic root of 13986515 is about 240.9368187768.

The spelling of 13986515 in words is "thirteen million, nine hundred eighty-six thousand, five hundred fifteen".