142868539 has 4 divisors (see below), whose sum is σ = 155856600. Its totient is φ = 129880480.

The previous prime is 142868533. The next prime is 142868563. The reversal of 142868539 is 935868241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142868539 - 2²¹ = 140771387 is a prime.

It is a super-2 number, since 2×142868539² = 40822838871989042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142868533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6494014 + ... + 6494035.

It is an arithmetic number, because the mean of its divisors is an integer number (38964150).

Almost surely, 2^142868539 is an apocalyptic number.

142868539 is a deficient number, since it is larger than the sum of its proper divisors (12988061).

142868539 is a wasteful number, since it uses less digits than its factorization.

142868539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12988060.

The product of its digits is 414720, while the sum is 46.

The square root of 142868539 is about 11952.7628186959. The cubic root of 142868539 is about 522.7718588620.

The spelling of 142868539 in words is "one hundred forty-two million, eight hundred sixty-eight thousand, five hundred thirty-nine".