142239789 has 12 divisors (see below), whose sum is σ = 206365536. Its totient is φ = 94407432.

The previous prime is 142239781. The next prime is 142239791. The reversal of 142239789 is 987932241.

It is not a de Polignac number, because 142239789 - 2³ = 142239781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142239781) 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 11 ways as a sum of consecutive naturals, for example, 32769 + ... + 36854.

It is an arithmetic number, because the mean of its divisors is an integer number (17197128).

Almost surely, 2^142239789 is an apocalyptic number.

It is an amenable number.

142239789 is a deficient number, since it is larger than the sum of its proper divisors (64125747).

142239789 is a wasteful number, since it uses less digits than its factorization.

142239789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69856 (or 69853 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 142239789 is about 11926.4323668061. The cubic root of 142239789 is about 522.0038423992.

The spelling of 142239789 in words is "one hundred forty-two million, two hundred thirty-nine thousand, seven hundred eighty-nine".