142044140 has 72 divisors (see below), whose sum is σ = 349255872. Its totient is φ = 48384000.

The previous prime is 142044109. The next prime is 142044151. The reversal of 142044140 is 41440241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188765 + ... + 189515.

It is an arithmetic number, because the mean of its divisors is an integer number (4850776).

Almost surely, 2^142044140 is an apocalyptic number.

142044140 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 142044140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174627936).

142044140 is an abundant number, since it is smaller than the sum of its proper divisors (207211732).

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

142044140 is a wasteful number, since it uses less digits than its factorization.

142044140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 142044140 is about 11918.2272171662. The cubic root of 142044140 is about 521.7643960571.

Adding to 142044140 its reverse (41440241), we get a palindrome (183484381).

The spelling of 142044140 in words is "one hundred forty-two million, forty-four thousand, one hundred forty".