120642440 has 16 divisors (see below), whose sum is σ = 271445580. Its totient is φ = 48256960.

The previous prime is 120642439. The next prime is 120642443. The reversal of 120642440 is 44246021.

It can be written as a sum of positive squares in 2 ways, for example, as 118504996 + 2137444 = 10886^2 + 1462^2 .

It is not an unprimeable number, because it can be changed into a prime (120642443) 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, 1507991 + ... + 1508070.

Almost surely, 2^120642440 is an apocalyptic number.

120642440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120642440 is an abundant number, since it is smaller than the sum of its proper divisors (150803140).

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

120642440 is a wasteful number, since it uses less digits than its factorization.

120642440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016072 (or 3016068 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 120642440 is about 10983.7352480839. The cubic root of 120642440 is about 494.1210672143.

Adding to 120642440 its reverse (44246021), we get a palindrome (164888461).

The spelling of 120642440 in words is "one hundred twenty million, six hundred forty-two thousand, four hundred forty".