132345721 has 2 divisors, whose sum is σ = 132345722. Its totient is φ = 132345720.

The previous prime is 132345683. The next prime is 132345737. The reversal of 132345721 is 127543231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 1929321 = 11420^2 + 1389^2 .

It is a cyclic number.

It is not a de Polignac number, because 132345721 - 2¹⁵ = 132312953 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 132345721.

It is not a weakly prime, because it can be changed into another prime (132345751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66172860 + 66172861.

It is an arithmetic number, because the mean of its divisors is an integer number (66172861).

Almost surely, 2^132345721 is an apocalyptic number.

It is an amenable number.

132345721 is a deficient number, since it is larger than the sum of its proper divisors (1).

132345721 is an equidigital number, since it uses as much as digits as its factorization.

132345721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 132345721 is about 11504.1610298187. The cubic root of 132345721 is about 509.6084666327.

Adding to 132345721 its reverse (127543231), we get a palindrome (259888952).

The spelling of 132345721 in words is "one hundred thirty-two million, three hundred forty-five thousand, seven hundred twenty-one".