120345540 has 96 divisors (see below), whose sum is σ = 389055744. Its totient is φ = 27225600.

The previous prime is 120345523. The next prime is 120345553. The reversal of 120345540 is 45543021.

It is a self number, because there is not a number n which added to its sum of digits gives 120345540.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41002 + ... + 43838.

It is an arithmetic number, because the mean of its divisors is an integer number (4052664).

Almost surely, 2^120345540 is an apocalyptic number.

120345540 is a gapful number since it is divisible by the number (10) 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 120345540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194527872).

120345540 is an abundant number, since it is smaller than the sum of its proper divisors (268710204).

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

120345540 is a wasteful number, since it uses less digits than its factorization.

120345540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957 (or 2955 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 120345540 is about 10970.2114838320. The cubic root of 120345540 is about 493.7153916885.

Adding to 120345540 its reverse (45543021), we get a palindrome (165888561).

The spelling of 120345540 in words is "one hundred twenty million, three hundred forty-five thousand, five hundred forty".