120904321 has 4 divisors (see below), whose sum is σ = 120927492. Its totient is φ = 120881152.

The previous prime is 120904283. The next prime is 120904327. The reversal of 120904321 is 123409021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123409021 = 9883 ⋅12487.

It can be written as a sum of positive squares in 2 ways, for example, as 79121025 + 41783296 = 8895^2 + 6464^2 .

It is a cyclic number.

It is not a de Polignac number, because 120904321 - 2⁷ = 120904193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120904292 and 120904301.

It is not an unprimeable number, because it can be changed into a prime (120904327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 15553.

It is an arithmetic number, because the mean of its divisors is an integer number (30231873).

Almost surely, 2^120904321 is an apocalyptic number.

It is an amenable number.

120904321 is a deficient number, since it is larger than the sum of its proper divisors (23171).

120904321 is an equidigital number, since it uses as much as digits as its factorization.

120904321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23170.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 120904321 is about 10995.6500944692. The cubic root of 120904321 is about 494.4783417105.

The spelling of 120904321 in words is "one hundred twenty million, nine hundred four thousand, three hundred twenty-one".