13612521 has 8 divisors (see below), whose sum is σ = 19546240. Its totient is φ = 8376912.

The previous prime is 13612507. The next prime is 13612537. The reversal of 13612521 is 12521631.

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

It is not a de Polignac number, because 13612521 - 2¹⁰ = 13611497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13612321) 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, 174481 + ... + 174558.

It is an arithmetic number, because the mean of its divisors is an integer number (2443280).

Almost surely, 2^13612521 is an apocalyptic number.

It is an amenable number.

13612521 is a deficient number, since it is larger than the sum of its proper divisors (5933719).

13612521 is a wasteful number, since it uses less digits than its factorization.

13612521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349055.

The product of its digits is 360, while the sum is 21.

The square root of 13612521 is about 3689.5150087783. The cubic root of 13612521 is about 238.7698688727.

The spelling of 13612521 in words is "thirteen million, six hundred twelve thousand, five hundred twenty-one".