130615621 has 2 divisors, whose sum is σ = 130615622. Its totient is φ = 130615620.

The previous prime is 130615609. The next prime is 130615637. The reversal of 130615621 is 126516031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101304225 + 29311396 = 10065^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 130615621 - 2⁹ = 130615109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130615601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65307810 + 65307811.

It is an arithmetic number, because the mean of its divisors is an integer number (65307811).

Almost surely, 2^130615621 is an apocalyptic number.

It is an amenable number.

130615621 is a deficient number, since it is larger than the sum of its proper divisors (1).

130615621 is an equidigital number, since it uses as much as digits as its factorization.

130615621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 130615621 is about 11428.7191320812. The cubic root of 130615621 is about 507.3780868233.

The spelling of 130615621 in words is "one hundred thirty million, six hundred fifteen thousand, six hundred twenty-one".