132720381 has 6 divisors (see below), whose sum is σ = 191707230. Its totient is φ = 88480248.

The previous prime is 132720337. The next prime is 132720383. The reversal of 132720381 is 183027231.

132720381 is a `hidden beast` number, since 13 + 272 + 0 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120231225 + 12489156 = 10965^2 + 3534^2 .

It is not a de Polignac number, because 132720381 - 2¹³ = 132712189 is a prime.

It is a super-2 number, since 2×132720381² = 35229399065570322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132720383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7373346 + ... + 7373363.

It is an arithmetic number, because the mean of its divisors is an integer number (31951205).

Almost surely, 2^132720381 is an apocalyptic number.

It is an amenable number.

132720381 is a deficient number, since it is larger than the sum of its proper divisors (58986849).

132720381 is a wasteful number, since it uses less digits than its factorization.

132720381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14746715 (or 14746712 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 132720381 is about 11520.4331949801. The cubic root of 132720381 is about 510.0889003041.

The spelling of 132720381 in words is "one hundred thirty-two million, seven hundred twenty thousand, three hundred eighty-one".