142330431 has 4 divisors (see below), whose sum is σ = 189773912. Its totient is φ = 94886952.

The previous prime is 142330421. The next prime is 142330439. The reversal of 142330431 is 134033241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142330431 - 2⁵ = 142330399 is a prime.

It is a super-2 number, since 2×142330431² = 40515903177291522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142330398 and 142330407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142330439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23721736 + ... + 23721741.

It is an arithmetic number, because the mean of its divisors is an integer number (47443478).

Almost surely, 2^142330431 is an apocalyptic number.

142330431 is a deficient number, since it is larger than the sum of its proper divisors (47443481).

142330431 is an equidigital number, since it uses as much as digits as its factorization.

142330431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47443480.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 142330431 is about 11930.2318083095. The cubic root of 142330431 is about 522.1147007968.

Adding to 142330431 its reverse (134033241), we get a palindrome (276363672).

The spelling of 142330431 in words is "one hundred forty-two million, three hundred thirty thousand, four hundred thirty-one".