132642221 has 4 divisors (see below), whose sum is σ = 133018332. Its totient is φ = 132266112.

The previous prime is 132642197. The next prime is 132642239. The reversal of 132642221 is 122246231.

It is a happy number.

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 44488900 + 88153321 = 6670^2 + 9389^2 .

It is a cyclic number.

It is not a de Polignac number, because 132642221 - 2¹⁸ = 132380077 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 (132645221) 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, 187526 + ... + 188231.

It is an arithmetic number, because the mean of its divisors is an integer number (33254583).

Almost surely, 2^132642221 is an apocalyptic number.

It is an amenable number.

132642221 is a deficient number, since it is larger than the sum of its proper divisors (376111).

132642221 is an equidigital number, since it uses as much as digits as its factorization.

132642221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376110.

The product of its digits is 1152, while the sum is 23.

The square root of 132642221 is about 11517.0404618548. The cubic root of 132642221 is about 509.9887489508.

Adding to 132642221 its reverse (122246231), we get a palindrome (254888452).

The spelling of 132642221 in words is "one hundred thirty-two million, six hundred forty-two thousand, two hundred twenty-one".