132130721 has 2 divisors, whose sum is σ = 132130722. Its totient is φ = 132130720.

The previous prime is 132130637. The next prime is 132130723. The reversal of 132130721 is 127031231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 23658496 = 10415^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 132130721 - 2¹⁸ = 131868577 is a prime.

Together with 132130723, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 132130693 and 132130702.

It is not a weakly prime, because it can be changed into another prime (132130723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66065360 + 66065361.

It is an arithmetic number, because the mean of its divisors is an integer number (66065361).

Almost surely, 2^132130721 is an apocalyptic number.

It is an amenable number.

132130721 is a deficient number, since it is larger than the sum of its proper divisors (1).

132130721 is an equidigital number, since it uses as much as digits as its factorization.

132130721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 132130721 is about 11494.8127866442. The cubic root of 132130721 is about 509.3323584614.

Adding to 132130721 its reverse (127031231), we get a palindrome (259161952).

The spelling of 132130721 in words is "one hundred thirty-two million, one hundred thirty thousand, seven hundred twenty-one".