132108721 has 2 divisors, whose sum is σ = 132108722. Its totient is φ = 132108720.

The previous prime is 132108667. The next prime is 132108773. The reversal of 132108721 is 127801231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76755121 + 55353600 = 8761^2 + 7440^2 .

It is a cyclic number.

It is not a de Polignac number, because 132108721 - 2²¹ = 130011569 is a prime.

It is not a weakly prime, because it can be changed into another prime (132102721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66054360 + 66054361.

It is an arithmetic number, because the mean of its divisors is an integer number (66054361).

Almost surely, 2^132108721 is an apocalyptic number.

It is an amenable number.

132108721 is a deficient number, since it is larger than the sum of its proper divisors (1).

132108721 is an equidigital number, since it uses as much as digits as its factorization.

132108721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 132108721 is about 11493.8557934228. The cubic root of 132108721 is about 509.3040886445.

Adding to 132108721 its reverse (127801231), we get a palindrome (259909952).

The spelling of 132108721 in words is "one hundred thirty-two million, one hundred eight thousand, seven hundred twenty-one".