120312420 has 24 divisors (see below), whose sum is σ = 336874944. Its totient is φ = 32083296.

The previous prime is 120312403. The next prime is 120312443. The reversal of 120312420 is 24213021.

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 120312420.

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, 1002544 + ... + 1002663.

It is an arithmetic number, because the mean of its divisors is an integer number (14036456).

Almost surely, 2^120312420 is an apocalyptic number.

120312420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120312420 is an abundant number, since it is smaller than the sum of its proper divisors (216562524).

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

120312420 is a wasteful number, since it uses less digits than its factorization.

120312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005219 (or 2005217 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 120312420 is about 10968.7018375011. The cubic root of 120312420 is about 493.6700961335.

Adding to 120312420 its reverse (24213021), we get a palindrome (144525441).

The spelling of 120312420 in words is "one hundred twenty million, three hundred twelve thousand, four hundred twenty".