120321506 has 4 divisors (see below), whose sum is σ = 180482262. Its totient is φ = 60160752.

The previous prime is 120321497. The next prime is 120321517. The reversal of 120321506 is 605123021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 38328481 = 9055^2 + 6191^2 .

It is a super-2 number, since 2×120321506² = 28954529612216072, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 30080375 + ... + 30080378.

Almost surely, 2^120321506 is an apocalyptic number.

120321506 is a deficient number, since it is larger than the sum of its proper divisors (60160756).

120321506 is an equidigital number, since it uses as much as digits as its factorization.

120321506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60160755.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 120321506 is about 10969.1160081385. The cubic root of 120321506 is about 493.6825231508.

Adding to 120321506 its reverse (605123021), we get a palindrome (725444527).

The spelling of 120321506 in words is "one hundred twenty million, three hundred twenty-one thousand, five hundred six".