120442521 has 4 divisors (see below), whose sum is σ = 160590032. Its totient is φ = 80295012.

The previous prime is 120442489. The next prime is 120442537. The reversal of 120442521 is 125244021.

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 not a de Polignac number, because 120442521 - 2⁵ = 120442489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120440521) 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, 20073751 + ... + 20073756.

It is an arithmetic number, because the mean of its divisors is an integer number (40147508).

Almost surely, 2^120442521 is an apocalyptic number.

It is an amenable number.

120442521 is a deficient number, since it is larger than the sum of its proper divisors (40147511).

120442521 is an equidigital number, since it uses as much as digits as its factorization.

120442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40147510.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 120442521 is about 10974.6307910563. The cubic root of 120442521 is about 493.8479770103.

Adding to 120442521 its reverse (125244021), we get a palindrome (245686542).

The spelling of 120442521 in words is "one hundred twenty million, four hundred forty-two thousand, five hundred twenty-one".