13287081 has 16 divisors (see below), whose sum is σ = 19070208. Its totient is φ = 8198400.

The previous prime is 13287049. The next prime is 13287083. The reversal of 13287081 is 18078231.

It is a happy number.

It is not a de Polignac number, because 13287081 - 2⁵ = 13287049 is a prime.

It is a super-2 number, since 2×13287081² = 353093043001122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13287083) 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, 976 + ... + 5246.

It is an arithmetic number, because the mean of its divisors is an integer number (1191888).

Almost surely, 2^13287081 is an apocalyptic number.

It is an amenable number.

13287081 is a deficient number, since it is larger than the sum of its proper divisors (5783127).

13287081 is a wasteful number, since it uses less digits than its factorization.

13287081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13287081 is about 3645.1448530888. The cubic root of 13287081 is about 236.8517116130.

The spelling of 13287081 in words is "thirteen million, two hundred eighty-seven thousand, eighty-one".