130526521 has 4 divisors (see below), whose sum is σ = 131247844. Its totient is φ = 129805200.

The previous prime is 130526437. The next prime is 130526531. The reversal of 130526521 is 125625031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 125686521 = 2200^2 + 11211^2 .

It is a cyclic number.

It is not a de Polignac number, because 130526521 - 2⁷ = 130526393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130526531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360390 + ... + 360751.

It is an arithmetic number, because the mean of its divisors is an integer number (32811961).

Almost surely, 2^130526521 is an apocalyptic number.

It is an amenable number.

130526521 is a deficient number, since it is larger than the sum of its proper divisors (721323).

130526521 is an equidigital number, since it uses as much as digits as its factorization.

130526521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721322.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 130526521 is about 11424.8203924613. The cubic root of 130526521 is about 507.2626905418.

The spelling of 130526521 in words is "one hundred thirty million, five hundred twenty-six thousand, five hundred twenty-one".