120640144 has 10 divisors (see below), whose sum is σ = 233740310. Its totient is φ = 60320064.

The previous prime is 120640141. The next prime is 120640171. The reversal of 120640144 is 441046021.

It can be written as a sum of positive squares in only one way, i.e., 79423744 + 41216400 = 8912^2 + 6420^2 .

It is not an unprimeable number, because it can be changed into a prime (120640141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3769989 + ... + 3770020.

It is an arithmetic number, because the mean of its divisors is an integer number (23374031).

Almost surely, 2^120640144 is an apocalyptic number.

It is an amenable number.

120640144 is a deficient number, since it is larger than the sum of its proper divisors (113100166).

120640144 is an equidigital number, since it uses as much as digits as its factorization.

120640144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7540017 (or 7540011 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 120640144 is about 10983.6307294082. The cubic root of 120640144 is about 494.1179325818.

Adding to 120640144 its reverse (441046021), we get a palindrome (561686165).

The spelling of 120640144 in words is "one hundred twenty million, six hundred forty thousand, one hundred forty-four".