142831 has 4 divisors (see below), whose sum is σ = 153832. Its totient is φ = 131832.

The previous prime is 142811. The next prime is 142837. The reversal of 142831 is 138241.

142831 is nontrivially palindromic in base 14.

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 142831 - 2⁵ = 142799 is a prime.

It is a super-2 number, since 2×142831² = 40801389122, which contains 22 as substring.

It is a Duffinian number.

142831 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 142799 and 142808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142837) 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, 5481 + ... + 5506.

It is an arithmetic number, because the mean of its divisors is an integer number (38458).

2¹⁴²⁸³¹ is an apocalyptic number.

142831 is a deficient number, since it is larger than the sum of its proper divisors (11001).

142831 is a wasteful number, since it uses less digits than its factorization.

142831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000.

The product of its digits is 192, while the sum is 19.

The square root of 142831 is about 377.9298876776. The cubic root of 142831 is about 52.2726068394.

The spelling of 142831 in words is "one hundred forty-two thousand, eight hundred thirty-one".