13456021 has 2 divisors, whose sum is σ = 13456022. Its totient is φ = 13456020.

The previous prime is 13456013. The next prime is 13456039. The reversal of 13456021 is 12065431.

13456021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 1240996 = 3495^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 13456021 - 2³ = 13456013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13455983 and 13456001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13453021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6728010 + 6728011.

It is an arithmetic number, because the mean of its divisors is an integer number (6728011).

Almost surely, 2^13456021 is an apocalyptic number.

It is an amenable number.

13456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13456021 is an equidigital number, since it uses as much as digits as its factorization.

13456021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13456021 is about 3668.2449482007. The cubic root of 13456021 is about 237.8513123966.

The spelling of 13456021 in words is "thirteen million, four hundred fifty-six thousand, twenty-one".