120321505 has 4 divisors (see below), whose sum is σ = 144385812. Its totient is φ = 96257200.

The previous prime is 120321497. The next prime is 120321517. The reversal of 120321505 is 505123021.

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 66210769 + 54110736 = 8137^2 + 7356^2 .

It is not a de Polignac number, because 120321505 - 2³ = 120321497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12032146 + ... + 12032155.

It is an arithmetic number, because the mean of its divisors is an integer number (36096453).

Almost surely, 2^120321505 is an apocalyptic number.

It is an amenable number.

120321505 is a deficient number, since it is larger than the sum of its proper divisors (24064307).

120321505 is an equidigital number, since it uses as much as digits as its factorization.

120321505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24064306.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 120321505 is about 10969.1159625560. The cubic root of 120321505 is about 493.6825217832.

Adding to 120321505 its reverse (505123021), we get a palindrome (625444526).

The spelling of 120321505 in words is "one hundred twenty million, three hundred twenty-one thousand, five hundred five".