13621371 has 8 divisors (see below), whose sum is σ = 18504720. Its totient is φ = 8909472.

The previous prime is 13621367. The next prime is 13621373. The reversal of 13621371 is 17312631.

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

It is not a de Polignac number, because 13621371 - 2² = 13621367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621373) 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, 42676 + ... + 42993.

It is an arithmetic number, because the mean of its divisors is an integer number (2313090).

Almost surely, 2^13621371 is an apocalyptic number.

13621371 is a deficient number, since it is larger than the sum of its proper divisors (4883349).

13621371 is an equidigital number, since it uses as much as digits as its factorization.

13621371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85725.

The product of its digits is 756, while the sum is 24.

The square root of 13621371 is about 3690.7141585335. The cubic root of 13621371 is about 238.8216020176.

The spelling of 13621371 in words is "thirteen million, six hundred twenty-one thousand, three hundred seventy-one".