13872621 has 8 divisors (see below), whose sum is σ = 21139264. Its totient is φ = 7927200.

The previous prime is 13872613. The next prime is 13872623. The reversal of 13872621 is 12627831.

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

It is not a de Polignac number, because 13872621 - 2³ = 13872613 is a prime.

It is a super-2 number, since 2×13872621² = 384899226819282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13872623) 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, 330280 + ... + 330321.

It is an arithmetic number, because the mean of its divisors is an integer number (2642408).

Almost surely, 2^13872621 is an apocalyptic number.

It is an amenable number.

13872621 is a deficient number, since it is larger than the sum of its proper divisors (7266643).

13872621 is an equidigital number, since it uses as much as digits as its factorization.

13872621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660611.

The product of its digits is 4032, while the sum is 30.

The square root of 13872621 is about 3724.5967566973. The cubic root of 13872621 is about 240.2810422961.

The spelling of 13872621 in words is "thirteen million, eight hundred seventy-two thousand, six hundred twenty-one".