13162021 has 8 divisors (see below), whose sum is σ = 13521024. Its totient is φ = 12806400.

The previous prime is 13161991. The next prime is 13162043. The reversal of 13162021 is 12026131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13162021 - 2²¹ = 11064869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13161986 and 13162004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13162081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8346 + ... + 9796.

It is an arithmetic number, because the mean of its divisors is an integer number (1690128).

Almost surely, 2^13162021 is an apocalyptic number.

It is an amenable number.

13162021 is a deficient number, since it is larger than the sum of its proper divisors (359003).

13162021 is a wasteful number, since it uses less digits than its factorization.

13162021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13162021 is about 3627.9499720917. The cubic root of 13162021 is about 236.1062733567.

Adding to 13162021 its reverse (12026131), we get a palindrome (25188152).

The spelling of 13162021 in words is "thirteen million, one hundred sixty-two thousand, twenty-one".