130505321 has 2 divisors, whose sum is σ = 130505322. Its totient is φ = 130505320.

The previous prime is 130505317. The next prime is 130505329. The reversal of 130505321 is 123505031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124434025 + 6071296 = 11155^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 130505321 - 2² = 130505317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130505293 and 130505302.

It is not a weakly prime, because it can be changed into another prime (130505329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65252660 + 65252661.

It is an arithmetic number, because the mean of its divisors is an integer number (65252661).

Almost surely, 2^130505321 is an apocalyptic number.

It is an amenable number.

130505321 is a deficient number, since it is larger than the sum of its proper divisors (1).

130505321 is an equidigital number, since it uses as much as digits as its factorization.

130505321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 130505321 is about 11423.8925502650. The cubic root of 130505321 is about 507.2352260051.

The spelling of 130505321 in words is "one hundred thirty million, five hundred five thousand, three hundred twenty-one".