142831717 has 8 divisors (see below), whose sum is σ = 166568000. Its totient is φ = 122426892.

The previous prime is 142831697. The next prime is 142831751. The reversal of 142831717 is 717138241.

It is not a de Polignac number, because 142831717 - 2⁷ = 142831589 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 (142834717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207867 + ... + 208552.

It is an arithmetic number, because the mean of its divisors is an integer number (20821000).

Almost surely, 2^142831717 is an apocalyptic number.

It is an amenable number.

142831717 is a deficient number, since it is larger than the sum of its proper divisors (23736283).

142831717 is an frugal number, since it uses more digits than its factorization.

142831717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416440 (or 416426 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 142831717 is about 11951.2224060972. Note that the first 3 decimals coincide. The cubic root of 142831717 is about 522.7269430732.

Adding to 142831717 its reverse (717138241), we get a palindrome (859969958).

The spelling of 142831717 in words is "one hundred forty-two million, eight hundred thirty-one thousand, seven hundred seventeen".