13520287 has 12 divisors (see below), whose sum is σ = 15671736. Its totient is φ = 11565440.

The previous prime is 13520279. The next prime is 13520303. The reversal of 13520287 is 78202531.

13520287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13520287 - 2³ = 13520279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1053 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (1305978).

Almost surely, 2^13520287 is an apocalyptic number.

13520287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13520287 is a deficient number, since it is larger than the sum of its proper divisors (2151449).

13520287 is a wasteful number, since it uses less digits than its factorization.

13520287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298 (or 4281 counting only the distinct ones).

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

The square root of 13520287 is about 3676.9942888180. The cubic root of 13520287 is about 238.2293707114.

The spelling of 13520287 in words is "thirteen million, five hundred twenty thousand, two hundred eighty-seven".