14721621 has 16 divisors (see below), whose sum is σ = 20613120. Its totient is φ = 9333360.

The previous prime is 14721611. The next prime is 14721661. The reversal of 14721621 is 12612741.

It is not a de Polignac number, because 14721621 - 2¹⁰ = 14720597 is a prime.

It is a super-2 number, since 2×14721621² = 433452249735282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 14721591 and 14721600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14721601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4146 + ... + 6828.

It is an arithmetic number, because the mean of its divisors is an integer number (1288320).

Almost surely, 2^14721621 is an apocalyptic number.

It is an amenable number.

14721621 is a deficient number, since it is larger than the sum of its proper divisors (5891499).

14721621 is a wasteful number, since it uses less digits than its factorization.

14721621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776.

The product of its digits is 672, while the sum is 24.

The square root of 14721621 is about 3836.8764640004. The cubic root of 14721621 is about 245.0860228261.

The spelling of 14721621 in words is "fourteen million, seven hundred twenty-one thousand, six hundred twenty-one".