14621921 has 4 divisors (see below), whose sum is σ = 15482052. Its totient is φ = 13761792.

The previous prime is 14621917. The next prime is 14621941. The reversal of 14621921 is 12912641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13542400 + 1079521 = 3680^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 14621921 - 2² = 14621917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14621941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430040 + ... + 430073.

It is an arithmetic number, because the mean of its divisors is an integer number (3870513).

Almost surely, 2^14621921 is an apocalyptic number.

It is an amenable number.

14621921 is a deficient number, since it is larger than the sum of its proper divisors (860131).

14621921 is an equidigital number, since it uses as much as digits as its factorization.

14621921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860130.

The product of its digits is 864, while the sum is 26.

The square root of 14621921 is about 3823.8620529512. The cubic root of 14621921 is about 244.5314995180.

The spelling of 14621921 in words is "fourteen million, six hundred twenty-one thousand, nine hundred twenty-one".