120420506 has 4 divisors (see below), whose sum is σ = 180630762. Its totient is φ = 60210252.

The previous prime is 120420497. The next prime is 120420529. The reversal of 120420506 is 605024021.

It is a happy number.

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., 63282025 + 57138481 = 7955^2 + 7559^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30105125 + ... + 30105128.

Almost surely, 2^120420506 is an apocalyptic number.

120420506 is a deficient number, since it is larger than the sum of its proper divisors (60210256).

120420506 is an equidigital number, since it uses as much as digits as its factorization.

120420506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60210255.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 120420506 is about 10973.6277502018. The cubic root of 120420506 is about 493.8178859605.

Adding to 120420506 its reverse (605024021), we get a palindrome (725444527).

The spelling of 120420506 in words is "one hundred twenty million, four hundred twenty thousand, five hundred six".