142438959 has 32 divisors (see below), whose sum is σ = 228264960. Its totient is φ = 87264864.

The previous prime is 142438957. The next prime is 142438973. The reversal of 142438959 is 959834241.

It is not a de Polignac number, because 142438959 - 2¹ = 142438957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142438957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91542 + ... + 93084.

It is an arithmetic number, because the mean of its divisors is an integer number (7133280).

Almost surely, 2^142438959 is an apocalyptic number.

142438959 is a deficient number, since it is larger than the sum of its proper divisors (85826001).

142438959 is a wasteful number, since it uses less digits than its factorization.

142438959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 1822 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 142438959 is about 11934.7793863146. The cubic root of 142438959 is about 522.2473725141.

The spelling of 142438959 in words is "one hundred forty-two million, four hundred thirty-eight thousand, nine hundred fifty-nine".