14640921 has 6 divisors (see below), whose sum is σ = 21148010. Its totient is φ = 9760608.

The previous prime is 14640883. The next prime is 14640929. The reversal of 14640921 is 12904641.

14640921 is a `hidden beast` number, since 14 + 640 + 9 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13286025 + 1354896 = 3645^2 + 1164^2 .

It is not a de Polignac number, because 14640921 - 2¹³ = 14632729 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 (14640929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 813376 + ... + 813393.

Almost surely, 2^14640921 is an apocalyptic number.

It is an amenable number.

14640921 is a deficient number, since it is larger than the sum of its proper divisors (6507089).

14640921 is a wasteful number, since it uses less digits than its factorization.

14640921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626775 (or 1626772 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 14640921 is about 3826.3456456520. The cubic root of 14640921 is about 244.6373699558.

The spelling of 14640921 in words is "fourteen million, six hundred forty thousand, nine hundred twenty-one".