120420505 has 8 divisors (see below), whose sum is σ = 147231432. Its totient is φ = 94518528.

The previous prime is 120420497. The next prime is 120420529. The reversal of 120420505 is 505024021.

It can be written as a sum of positive squares in 4 ways, for example, as 583696 + 119836809 = 764^2 + 10947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120420505 - 2³ = 120420497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226944 + ... + 227473.

It is an arithmetic number, because the mean of its divisors is an integer number (18403929).

Almost surely, 2^120420505 is an apocalyptic number.

It is an amenable number.

120420505 is a deficient number, since it is larger than the sum of its proper divisors (26810927).

120420505 is an equidigital number, since it uses as much as digits as its factorization.

120420505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454475.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 120420505 is about 10973.6277046381. The cubic root of 120420505 is about 493.8178845935.

Adding to 120420505 its reverse (505024021), we get a palindrome (625444526).

The spelling of 120420505 in words is "one hundred twenty million, four hundred twenty thousand, five hundred five".