15364021 has 2 divisors, whose sum is σ = 15364022. Its totient is φ = 15364020.

The previous prime is 15364007. The next prime is 15364033. The reversal of 15364021 is 12046351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14333796 + 1030225 = 3786^2 + 1015^2 .

It is an emirp because it is prime and its reverse (12046351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15364021 - 2⁷ = 15363893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15363983 and 15364001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15364001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7682010 + 7682011.

It is an arithmetic number, because the mean of its divisors is an integer number (7682011).

Almost surely, 2^15364021 is an apocalyptic number.

It is an amenable number.

15364021 is a deficient number, since it is larger than the sum of its proper divisors (1).

15364021 is an equidigital number, since it uses as much as digits as its factorization.

15364021 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 15364021 is about 3919.6965443769. The cubic root of 15364021 is about 248.6002898718.

The spelling of 15364021 in words is "fifteen million, three hundred sixty-four thousand, twenty-one".