13521287 has 8 divisors (see below), whose sum is σ = 14612304. Its totient is φ = 12437568.

The previous prime is 13521283. The next prime is 13521323. The reversal of 13521287 is 78212531.

13521287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13521287 - 2² = 13521283 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 (13521283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2408 + ... + 5730.

It is an arithmetic number, because the mean of its divisors is an integer number (1826538).

Almost surely, 2^13521287 is an apocalyptic number.

13521287 is a deficient number, since it is larger than the sum of its proper divisors (1091017).

13521287 is a wasteful number, since it uses less digits than its factorization.

13521287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its digits is 3360, while the sum is 29.

The square root of 13521287 is about 3677.1302669337. The cubic root of 13521287 is about 238.2352439471.

The spelling of 13521287 in words is "thirteen million, five hundred twenty-one thousand, two hundred eighty-seven".