132256721 has 4 divisors (see below), whose sum is σ = 133144500. Its totient is φ = 131368944.

The previous prime is 132256717. The next prime is 132256771. The reversal of 132256721 is 127652231.

It is a happy number.

132256721 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48790225 + 83466496 = 6985^2 + 9136^2 .

It is a cyclic number.

It is not a de Polignac number, because 132256721 - 2² = 132256717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132256711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443666 + ... + 443963.

It is an arithmetic number, because the mean of its divisors is an integer number (33286125).

Almost surely, 2^132256721 is an apocalyptic number.

It is an amenable number.

132256721 is a deficient number, since it is larger than the sum of its proper divisors (887779).

132256721 is an equidigital number, since it uses as much as digits as its factorization.

132256721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887778.

The product of its digits is 5040, while the sum is 29.

The square root of 132256721 is about 11500.2922136787. The cubic root of 132256721 is about 509.4942069906.

The spelling of 132256721 in words is "one hundred thirty-two million, two hundred fifty-six thousand, seven hundred twenty-one".