13287520 has 24 divisors (see below), whose sum is σ = 31392144. Its totient is φ = 5314944.

The previous prime is 13287503. The next prime is 13287541. The reversal of 13287520 is 2578231.

It is a congruent 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, 41364 + ... + 41683.

It is an arithmetic number, because the mean of its divisors is an integer number (1308006).

Almost surely, 2^13287520 is an apocalyptic number.

13287520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13287520 is an abundant number, since it is smaller than the sum of its proper divisors (18104624).

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

13287520 is an equidigital number, since it uses as much as digits as its factorization.

13287520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83062 (or 83054 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13287520 is about 3645.2050696772. The cubic root of 13287520 is about 236.8543200804.

The spelling of 13287520 in words is "thirteen million, two hundred eighty-seven thousand, five hundred twenty".