132440021 has 4 divisors (see below), whose sum is σ = 151360032. Its totient is φ = 113520012.

The previous prime is 132439969. The next prime is 132440023. The reversal of 132440021 is 120044231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 132440021 - 2¹⁴ = 132423637 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 (132440023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9459995 + ... + 9460008.

It is an arithmetic number, because the mean of its divisors is an integer number (37840008).

Almost surely, 2^132440021 is an apocalyptic number.

It is an amenable number.

132440021 is a deficient number, since it is larger than the sum of its proper divisors (18920011).

132440021 is an equidigital number, since it uses as much as digits as its factorization.

132440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18920010.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 132440021 is about 11508.2588170409. The cubic root of 132440021 is about 509.7294746230.

Adding to 132440021 its reverse (120044231), we get a palindrome (252484252).

The spelling of 132440021 in words is "one hundred thirty-two million, four hundred forty thousand, twenty-one".