132871721 has 2 divisors, whose sum is σ = 132871722. Its totient is φ = 132871720.

The previous prime is 132871709. The next prime is 132871727. The reversal of 132871721 is 127178231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 58308496 = 8635^2 + 7636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132871721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (132871727) 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 as a sum of consecutive naturals, namely, 66435860 + 66435861.

It is an arithmetic number, because the mean of its divisors is an integer number (66435861).

Almost surely, 2^132871721 is an apocalyptic number.

It is an amenable number.

132871721 is a deficient number, since it is larger than the sum of its proper divisors (1).

132871721 is an equidigital number, since it uses as much as digits as its factorization.

132871721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 32.

The square root of 132871721 is about 11526.9996529886. Note that the first 3 decimals coincide. The cubic root of 132871721 is about 510.2827101014.

The spelling of 132871721 in words is "one hundred thirty-two million, eight hundred seventy-one thousand, seven hundred twenty-one".