120020505 has 48 divisors (see below), whose sum is σ = 213736320. Its totient is φ = 57460480.

The previous prime is 120020501. The next prime is 120020507. The reversal of 120020505 is 505020021.

It is not a de Polignac number, because 120020505 - 2² = 120020501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (120020501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161164 + ... + 161906.

It is an arithmetic number, because the mean of its divisors is an integer number (4452840).

Almost surely, 2^120020505 is an apocalyptic number.

120020505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120020505 is a deficient number, since it is larger than the sum of its proper divisors (93715815).

120020505 is a wasteful number, since it uses less digits than its factorization.

120020505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 120020505 is about 10955.3870310455. The cubic root of 120020505 is about 493.2705075319.

Adding to 120020505 its reverse (505020021), we get a palindrome (625040526).

The spelling of 120020505 in words is "one hundred twenty million, twenty thousand, five hundred five".