120402420 has 24 divisors (see below), whose sum is σ = 337126944. Its totient is φ = 32107296.

The previous prime is 120402371. The next prime is 120402427. The reversal of 120402420 is 24204021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 120402420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120402427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003294 + ... + 1003413.

It is an arithmetic number, because the mean of its divisors is an integer number (14046956).

Almost surely, 2^120402420 is an apocalyptic number.

120402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120402420 is an abundant number, since it is smaller than the sum of its proper divisors (216724524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120402420 is a wasteful number, since it uses less digits than its factorization.

120402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006719 (or 2006717 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 120402420 is about 10972.8036526678. The cubic root of 120402420 is about 493.7931624928.

Adding to 120402420 its reverse (24204021), we get a palindrome (144606441).

The spelling of 120402420 in words is "one hundred twenty million, four hundred two thousand, four hundred twenty".