14388921 has 20 divisors (see below), whose sum is σ = 21598500. Its totient is φ = 9546336.

The previous prime is 14388911. The next prime is 14388943. The reversal of 14388921 is 12988341.

14388921 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 11148921 + 3240000 = 3339^2 + 1800^2 .

It is not a de Polignac number, because 14388921 - 2⁷ = 14388793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14388911) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28015 + ... + 28523.

It is an arithmetic number, because the mean of its divisors is an integer number (1079925).

Almost surely, 2^14388921 is an apocalyptic number.

It is an amenable number.

14388921 is a deficient number, since it is larger than the sum of its proper divisors (7209579).

14388921 is an equidigital number, since it uses as much as digits as its factorization.

14388921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 861 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 14388921 is about 3793.2731248883. The cubic root of 14388921 is about 243.2256705594.

The spelling of 14388921 in words is "fourteen million, three hundred eighty-eight thousand, nine hundred twenty-one".