13924921 has 8 divisors (see below), whose sum is σ = 15220224. Its totient is φ = 12682560.

The previous prime is 13924919. The next prime is 13924931. The reversal of 13924921 is 12942931.

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 13924921 - 2¹ = 13924919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13924931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12685 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (1902528).

Almost surely, 2^13924921 is an apocalyptic number.

It is an amenable number.

13924921 is a deficient number, since it is larger than the sum of its proper divisors (1295303).

13924921 is a wasteful number, since it uses less digits than its factorization.

13924921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26471.

The product of its digits is 3888, while the sum is 31.

The square root of 13924921 is about 3731.6110461837. The cubic root of 13924921 is about 240.5826180711.

The spelling of 13924921 in words is "thirteen million, nine hundred twenty-four thousand, nine hundred twenty-one".