132721556 has 12 divisors (see below), whose sum is σ = 253377600. Its totient is φ = 60327960.

The previous prime is 132721549. The next prime is 132721591. The reversal of 132721556 is 655127231.

It is a super-2 number, since 2×132721556² = 35230022854122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508156 + ... + 1508243.

It is an arithmetic number, because the mean of its divisors is an integer number (21114800).

Almost surely, 2^132721556 is an apocalyptic number.

It is an amenable number.

132721556 is a deficient number, since it is larger than the sum of its proper divisors (120656044).

132721556 is a wasteful number, since it uses less digits than its factorization.

132721556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016414 (or 3016412 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 132721556 is about 11520.4841912135. The cubic root of 132721556 is about 510.0904056059.

Adding to 132721556 its reverse (655127231), we get a palindrome (787848787).

The spelling of 132721556 in words is "one hundred thirty-two million, seven hundred twenty-one thousand, five hundred fifty-six".