14807921 has 2 divisors, whose sum is σ = 14807922. Its totient is φ = 14807920.

The previous prime is 14807917. The next prime is 14807939. The reversal of 14807921 is 12970841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14714896 + 93025 = 3836^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 14807921 - 2² = 14807917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (14807911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7403960 + 7403961.

It is an arithmetic number, because the mean of its divisors is an integer number (7403961).

Almost surely, 2^14807921 is an apocalyptic number.

It is an amenable number.

14807921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14807921 is an equidigital number, since it uses as much as digits as its factorization.

14807921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 14807921 is about 3848.1061575793. The cubic root of 14807921 is about 245.5639984524.

The spelling of 14807921 in words is "fourteen million, eight hundred seven thousand, nine hundred twenty-one".