142239977 has 8 divisors (see below), whose sum is σ = 156454752. Its totient is φ = 129307860.

The previous prime is 142239971. The next prime is 142240009. The reversal of 142239977 is 779932241.

142239977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142239977 - 2⁴ = 142239961 is a prime.

It is a super-2 number, since 2×142239977² = 40464422113921058, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (142239971) 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, 52103 + ... + 54764.

It is an arithmetic number, because the mean of its divisors is an integer number (19556844).

Almost surely, 2^142239977 is an apocalyptic number.

It is an amenable number.

142239977 is a deficient number, since it is larger than the sum of its proper divisors (14214775).

142239977 is an equidigital number, since it uses as much as digits as its factorization.

142239977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106900 (or 106878 counting only the distinct ones).

The product of its digits is 190512, while the sum is 44.

The square root of 142239977 is about 11926.4402484564. The cubic root of 142239977 is about 522.0040723786.

The spelling of 142239977 in words is "one hundred forty-two million, two hundred thirty-nine thousand, nine hundred seventy-seven".