13285987 has 16 divisors (see below), whose sum is σ = 15912288. Its totient is φ = 10932480.

The previous prime is 13285981. The next prime is 13285991. The reversal of 13285987 is 78958231.

It is not a de Polignac number, because 13285987 - 2⁷ = 13285859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13285981) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6703 + ... + 8455.

It is an arithmetic number, because the mean of its divisors is an integer number (994518).

Almost surely, 2^13285987 is an apocalyptic number.

13285987 is a deficient number, since it is larger than the sum of its proper divisors (2626301).

13285987 is a wasteful number, since it uses less digits than its factorization.

13285987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830.

The product of its digits is 120960, while the sum is 43.

The square root of 13285987 is about 3644.9947873762. The cubic root of 13285987 is about 236.8452109907.

The spelling of 13285987 in words is "thirteen million, two hundred eighty-five thousand, nine hundred eighty-seven".