142320431 has 8 divisors (see below), whose sum is σ = 163430400. Its totient is φ = 122572440.

The previous prime is 142320421. The next prime is 142320443. The reversal of 142320431 is 134023241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142320431 is a prime.

It is a super-2 number, since 2×142320431² = 40510210160051522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340271 + ... + 340688.

It is an arithmetic number, because the mean of its divisors is an integer number (20428800).

Almost surely, 2^142320431 is an apocalyptic number.

142320431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142320431 is a deficient number, since it is larger than the sum of its proper divisors (21109969).

142320431 is a wasteful number, since it uses less digits than its factorization.

142320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680989.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142320431 is about 11929.8126976076. The cubic root of 142320431 is about 522.1024727506.

Adding to 142320431 its reverse (134023241), we get a palindrome (276343672).

The spelling of 142320431 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred thirty-one".