142432331 has 4 divisors (see below), whose sum is σ = 142580592. Its totient is φ = 142284072.

The previous prime is 142432309. The next prime is 142432337. The reversal of 142432331 is 133234241.

142432331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133234241 = 7 ⋅19033463.

It is a cyclic number.

It is not a de Polignac number, because 142432331 - 2¹⁰ = 142431307 is a prime.

It is a super-2 number, since 2×142432331² = 40573937828187122, 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 = 142432297 and 142432306.

It is not an unprimeable number, because it can be changed into a prime (142432337) 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, 72680 + ... + 74613.

It is an arithmetic number, because the mean of its divisors is an integer number (35645148).

Almost surely, 2^142432331 is an apocalyptic number.

142432331 is a deficient number, since it is larger than the sum of its proper divisors (148261).

142432331 is an equidigital number, since it uses as much as digits as its factorization.

142432331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148260.

The product of its digits is 1728, while the sum is 23.

The square root of 142432331 is about 11934.5017072352. The cubic root of 142432331 is about 522.2392719464.

Adding to 142432331 its reverse (133234241), we get a palindrome (275666572).

The spelling of 142432331 in words is "one hundred forty-two million, four hundred thirty-two thousand, three hundred thirty-one".