142239790 has 32 divisors (see below), whose sum is σ = 319209984. Its totient is φ = 44334240.

The previous prime is 142239781. The next prime is 142239791. The reversal of 142239790 is 97932241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142239791) 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 15 ways as a sum of consecutive naturals, for example, 91594 + ... + 93133.

It is an arithmetic number, because the mean of its divisors is an integer number (9975312).

Almost surely, 2^142239790 is an apocalyptic number.

142239790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142239790 is an abundant number, since it is smaller than the sum of its proper divisors (176970194).

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

142239790 is a wasteful number, since it uses less digits than its factorization.

142239790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184752.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 142239790 is about 11926.4324087298. The cubic root of 142239790 is about 522.0038436225.

It can be divided in two parts, 142 and 239790, that added together give a palindrome (239932).

The spelling of 142239790 in words is "one hundred forty-two million, two hundred thirty-nine thousand, seven hundred ninety".