13712621 has 8 divisors (see below), whose sum is σ = 15277080. Its totient is φ = 12220992.

The previous prime is 13712609. The next prime is 13712627. The reversal of 13712621 is 12621731.

It can be written as a sum of positive squares in 4 ways, for example, as 1188100 + 12524521 = 1090^2 + 3539^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13712621 - 2¹⁸ = 13450477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13712627) 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, 17810 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (1909635).

Almost surely, 2^13712621 is an apocalyptic number.

It is an amenable number.

13712621 is a deficient number, since it is larger than the sum of its proper divisors (1564459).

13712621 is a wasteful number, since it uses less digits than its factorization.

13712621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36415.

The product of its digits is 504, while the sum is 23.

The square root of 13712621 is about 3703.0556301519. The cubic root of 13712621 is about 239.3537067685.

The spelling of 13712621 in words is "thirteen million, seven hundred twelve thousand, six hundred twenty-one".