142395989 has 8 divisors (see below), whose sum is σ = 147164160. Its totient is φ = 137638800.

The previous prime is 142395983. The next prime is 142395991. The reversal of 142395989 is 989593241.

It is a happy number.

142395989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142395989 - 2⁴ = 142395973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142395983) 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, 29999 + ... + 34419.

It is an arithmetic number, because the mean of its divisors is an integer number (18395520).

Almost surely, 2^142395989 is an apocalyptic number.

It is an amenable number.

142395989 is a deficient number, since it is larger than the sum of its proper divisors (4768171).

142395989 is a wasteful number, since it uses less digits than its factorization.

142395989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491.

The product of its digits is 699840, while the sum is 50.

The square root of 142395989 is about 11932.9790496757. The cubic root of 142395989 is about 522.1948512405.

The spelling of 142395989 in words is "one hundred forty-two million, three hundred ninety-five thousand, nine hundred eighty-nine".