120620321 has 4 divisors (see below), whose sum is σ = 127715652. Its totient is φ = 113524992.

The previous prime is 120620293. The next prime is 120620327. The reversal of 120620321 is 123026021.

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 40768225 + 79852096 = 6385^2 + 8936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120620321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7095313 = 120620321 / (1 + 2 + 0 + 6 + 2 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120620321.

It is not an unprimeable number, because it can be changed into a prime (120620327) 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, 3547640 + ... + 3547673.

It is an arithmetic number, because the mean of its divisors is an integer number (31928913).

Almost surely, 2^120620321 is an apocalyptic number.

It is an amenable number.

120620321 is a deficient number, since it is larger than the sum of its proper divisors (7095331).

120620321 is an equidigital number, since it uses as much as digits as its factorization.

120620321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095330.

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

The square root of 120620321 is about 10982.7283040235. The cubic root of 120620321 is about 494.0908674165.

Adding to 120620321 its reverse (123026021), we get a palindrome (243646342).

The spelling of 120620321 in words is "one hundred twenty million, six hundred twenty thousand, three hundred twenty-one".