13290921 has 12 divisors (see below), whose sum is σ = 21940672. Its totient is φ = 7594776.

The previous prime is 13290917. The next prime is 13290973. The reversal of 13290921 is 12909231.

It is not a de Polignac number, because 13290921 - 2² = 13290917 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 (13290911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105421 + ... + 105546.

Almost surely, 2^13290921 is an apocalyptic number.

It is an amenable number.

13290921 is a deficient number, since it is larger than the sum of its proper divisors (8649751).

13290921 is a wasteful number, since it uses less digits than its factorization.

13290921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210980 (or 210977 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 13290921 is about 3645.6715430768. The cubic root of 13290921 is about 236.8745263297.

The spelling of 13290921 in words is "thirteen million, two hundred ninety thousand, nine hundred twenty-one".