142731 has 6 divisors (see below), whose sum is σ = 206180. Its totient is φ = 95148.

The previous prime is 142711. The next prime is 142733. The reversal of 142731 is 137241.

142731 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 142731 - 2⁵ = 142699 is a prime.

It is a super-2 number, since 2×142731² = 40744276722, which contains 22 as substring.

It is a Duffinian number.

142731 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142731.

It is not an unprimeable number, because it can be changed into a prime (142733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7921 + ... + 7938.

2¹⁴²⁷³¹ is an apocalyptic number.

142731 is a deficient number, since it is larger than the sum of its proper divisors (63449).

142731 is a wasteful number, since it uses less digits than its factorization.

142731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15865 (or 15862 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 142731 is about 377.7975648413. The cubic root of 142731 is about 52.2604048172.

Adding to 142731 its reverse (137241), we get a palindrome (279972).

The spelling of 142731 in words is "one hundred forty-two thousand, seven hundred thirty-one".