120421856 has 48 divisors (see below), whose sum is σ = 246250368. Its totient is φ = 57907200.

The previous prime is 120421841. The next prime is 120421901. The reversal of 120421856 is 658124021.

It is a congruent 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, 230876 + ... + 231396.

It is an arithmetic number, because the mean of its divisors is an integer number (5130216).

Almost surely, 2^120421856 is an apocalyptic number.

120421856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120421856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123125184).

120421856 is an abundant number, since it is smaller than the sum of its proper divisors (125828512).

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

120421856 is a wasteful number, since it uses less digits than its factorization.

120421856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 120421856 is about 10973.6892611373. The cubic root of 120421856 is about 493.8197313041.

Adding to 120421856 its reverse (658124021), we get a palindrome (778545877).

The spelling of 120421856 in words is "one hundred twenty million, four hundred twenty-one thousand, eight hundred fifty-six".