132431021 has 4 divisors (see below), whose sum is σ = 133919100. Its totient is φ = 130942944.

The previous prime is 132430993. The next prime is 132431041. The reversal of 132431021 is 120134231.

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 13402921 + 119028100 = 3661^2 + 10910^2 .

It is a cyclic number.

It is not a de Polignac number, because 132431021 - 2⁶ = 132430957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132431041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743906 + ... + 744083.

It is an arithmetic number, because the mean of its divisors is an integer number (33479775).

Almost surely, 2^132431021 is an apocalyptic number.

It is an amenable number.

132431021 is a deficient number, since it is larger than the sum of its proper divisors (1488079).

132431021 is an equidigital number, since it uses as much as digits as its factorization.

132431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488078.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 132431021 is about 11507.8677868665. The cubic root of 132431021 is about 509.7179280900.

Adding to 132431021 its reverse (120134231), we get a palindrome (252565252).

The spelling of 132431021 in words is "one hundred thirty-two million, four hundred thirty-one thousand, twenty-one".