13164021 has 24 divisors (see below), whose sum is σ = 20835360. Its totient is φ = 7959456.

The previous prime is 13163989. The next prime is 13164023. The reversal of 13164021 is 12046131.

It is a happy number.

13164021 is a `hidden beast` number, since 1 + 3 + 1 + 640 + 21 = 666.

It is not a de Polignac number, because 13164021 - 2⁵ = 13163989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13163985 and 13164003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13164023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5950 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (868140).

Almost surely, 2^13164021 is an apocalyptic number.

It is an amenable number.

13164021 is a deficient number, since it is larger than the sum of its proper divisors (7671339).

13164021 is a wasteful number, since it uses less digits than its factorization.

13164021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13164021 is about 3628.2255993805. The cubic root of 13164021 is about 236.1182317186.

The spelling of 13164021 in words is "thirteen million, one hundred sixty-four thousand, twenty-one".