130757521 has 2 divisors, whose sum is σ = 130757522. Its totient is φ = 130757520.

The previous prime is 130757479. The next prime is 130757533. The reversal of 130757521 is 125757031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126900225 + 3857296 = 11265^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 130757521 - 2⁹ = 130757009 is a prime.

It is not a weakly prime, because it can be changed into another prime (130757021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65378760 + 65378761.

It is an arithmetic number, because the mean of its divisors is an integer number (65378761).

Almost surely, 2^130757521 is an apocalyptic number.

It is an amenable number.

130757521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130757521 is an equidigital number, since it uses as much as digits as its factorization.

130757521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 130757521 is about 11434.9254916681. The cubic root of 130757521 is about 507.5617577945.

The spelling of 130757521 in words is "one hundred thirty million, seven hundred fifty-seven thousand, five hundred twenty-one".