130137521 has 2 divisors, whose sum is σ = 130137522. Its totient is φ = 130137520.

The previous prime is 130137503. The next prime is 130137523. The reversal of 130137521 is 125731031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124567921 + 5569600 = 11161^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 130137521 - 2¹⁸ = 129875377 is a prime.

Together with 130137523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130137523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65068760 + 65068761.

It is an arithmetic number, because the mean of its divisors is an integer number (65068761).

Almost surely, 2^130137521 is an apocalyptic number.

It is an amenable number.

130137521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130137521 is an equidigital number, since it uses as much as digits as its factorization.

130137521 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 23.

The square root of 130137521 is about 11407.7833517296. The cubic root of 130137521 is about 506.7582680546.

Adding to 130137521 its reverse (125731031), we get a palindrome (255868552).

The spelling of 130137521 in words is "one hundred thirty million, one hundred thirty-seven thousand, five hundred twenty-one".