142623431 has 4 divisors (see below), whose sum is σ = 142797552. Its totient is φ = 142449312.

The previous prime is 142623409. The next prime is 142623463. The reversal of 142623431 is 134326241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134326241 = 7 ⋅19189463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142623431 is a prime.

It is a super-2 number, since 2×142623431² = 40682886140423522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142623431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142623031) 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, 85826 + ... + 87471.

It is an arithmetic number, because the mean of its divisors is an integer number (35699388).

Almost surely, 2^142623431 is an apocalyptic number.

142623431 is a deficient number, since it is larger than the sum of its proper divisors (174121).

142623431 is an equidigital number, since it uses as much as digits as its factorization.

142623431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174120.

The product of its digits is 3456, while the sum is 26.

The square root of 142623431 is about 11942.5052229421. The cubic root of 142623431 is about 522.4727285965.

Adding to 142623431 its reverse (134326241), we get a palindrome (276949672).

The spelling of 142623431 in words is "one hundred forty-two million, six hundred twenty-three thousand, four hundred thirty-one".