142320140 has 24 divisors (see below), whose sum is σ = 300122592. Its totient is φ = 56689920.

The previous prime is 142320097. The next prime is 142320149. The reversal of 142320140 is 41023241.

It is not an unprimeable number, because it can be changed into a prime (142320149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9944 + ... + 19583.

It is an arithmetic number, because the mean of its divisors is an integer number (12505108).

Almost surely, 2^142320140 is an apocalyptic number.

142320140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142320140 is an abundant number, since it is smaller than the sum of its proper divisors (157802452).

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

142320140 is a wasteful number, since it uses less digits than its factorization.

142320140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29777 (or 29775 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 142320140 is about 11929.8005012657. The cubic root of 142320140 is about 522.1021169058.

Adding to 142320140 its reverse (41023241), we get a palindrome (183343381).

It can be divided in two parts, 1423201 and 40, that added together give a palindrome (1423241).

The spelling of 142320140 in words is "one hundred forty-two million, three hundred twenty thousand, one hundred forty".