120921440 has 24 divisors (see below), whose sum is σ = 285677280. Its totient is φ = 48368512.

The previous prime is 120921401. The next prime is 120921443. The reversal of 120921440 is 44129021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120921443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377720 + ... + 378039.

It is an arithmetic number, because the mean of its divisors is an integer number (11903220).

Almost surely, 2^120921440 is an apocalyptic number.

120921440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120921440 is an abundant number, since it is smaller than the sum of its proper divisors (164755840).

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

120921440 is an equidigital number, since it uses as much as digits as its factorization.

120921440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755774 (or 755766 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 120921440 is about 10996.4285111121. The cubic root of 120921440 is about 494.5016785528.

The spelling of 120921440 in words is "one hundred twenty million, nine hundred twenty-one thousand, four hundred forty".