130004521 has 2 divisors, whose sum is σ = 130004522. Its totient is φ = 130004520.

The previous prime is 130004519. The next prime is 130004543. The reversal of 130004521 is 125400031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129960000 + 44521 = 11400^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 130004521 - 2¹ = 130004519 is a prime.

Together with 130004519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 130004495 and 130004504.

It is not a weakly prime, because it can be changed into another prime (130004561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65002260 + 65002261.

It is an arithmetic number, because the mean of its divisors is an integer number (65002261).

Almost surely, 2^130004521 is an apocalyptic number.

It is an amenable number.

130004521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130004521 is an equidigital number, since it uses as much as digits as its factorization.

130004521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 130004521 is about 11401.9525082330. The cubic root of 130004521 is about 506.5855742698.

Adding to 130004521 its reverse (125400031), we get a palindrome (255404552).

The spelling of 130004521 in words is "one hundred thirty million, four thousand, five hundred twenty-one".