14381921 has 4 divisors (see below), whose sum is σ = 14653332. Its totient is φ = 14110512.

The previous prime is 14381911. The next prime is 14381933. The reversal of 14381921 is 12918341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12918341 = 23 ⋅561667.

It can be written as a sum of positive squares in 2 ways, for example, as 9541921 + 4840000 = 3089^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14381921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (14381911) 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, 135626 + ... + 135731.

It is an arithmetic number, because the mean of its divisors is an integer number (3663333).

Almost surely, 2^14381921 is an apocalyptic number.

It is an amenable number.

14381921 is a deficient number, since it is larger than the sum of its proper divisors (271411).

14381921 is an equidigital number, since it uses as much as digits as its factorization.

14381921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271410.

The product of its digits is 1728, while the sum is 29.

The square root of 14381921 is about 3792.3503266444. The cubic root of 14381921 is about 243.1862222490.

The spelling of 14381921 in words is "fourteen million, three hundred eighty-one thousand, nine hundred twenty-one".