130370521 has 2 divisors, whose sum is σ = 130370522. Its totient is φ = 130370520.

The previous prime is 130370503. The next prime is 130370557. The reversal of 130370521 is 125073031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 4145296 = 11235^2 + 2036^2 .

It is a cyclic number.

It is not a de Polignac number, because 130370521 - 2⁵ = 130370489 is a prime.

It is a super-4 number, since 4×130370521⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 130370492 and 130370501.

It is not a weakly prime, because it can be changed into another prime (130370561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65185260 + 65185261.

It is an arithmetic number, because the mean of its divisors is an integer number (65185261).

Almost surely, 2^130370521 is an apocalyptic number.

It is an amenable number.

130370521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130370521 is an equidigital number, since it uses as much as digits as its factorization.

130370521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 130370521 is about 11417.9911105238. The cubic root of 130370521 is about 507.0605233869.

It can be divided in two parts, 1303 and 70521, that added together give a square (71824 = 268²).

The spelling of 130370521 in words is "one hundred thirty million, three hundred seventy thousand, five hundred twenty-one".