120142344 has 64 divisors (see below), whose sum is σ = 351267840. Its totient is φ = 33526080.

The previous prime is 120142333. The next prime is 120142403. The reversal of 120142344 is 443241021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 120142344.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1092 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (5488560).

Almost surely, 2^120142344 is an apocalyptic number.

120142344 is a gapful number since it is divisible by the number (14) 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 120142344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175633920).

120142344 is an abundant number, since it is smaller than the sum of its proper divisors (231125496).

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

120142344 is a wasteful number, since it uses less digits than its factorization.

120142344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16690 (or 16686 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 120142344 is about 10960.9463095118. The cubic root of 120142344 is about 493.4373658536.

Adding to 120142344 its reverse (443241021), we get a palindrome (563383365).

The spelling of 120142344 in words is "one hundred twenty million, one hundred forty-two thousand, three hundred forty-four".