142042231 has 4 divisors (see below), whose sum is σ = 142100464. Its totient is φ = 141984000.

The previous prime is 142042207. The next prime is 142042247. The reversal of 142042231 is 132240241.

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 142042231 - 2¹⁵ = 142009463 is a prime.

It is a super-2 number, since 2×142042231² = 40351990774914722, 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 = 142042199 and 142042208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142042331) 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, 25290 + ... + 30391.

It is an arithmetic number, because the mean of its divisors is an integer number (35525116).

Almost surely, 2^142042231 is an apocalyptic number.

142042231 is a deficient number, since it is larger than the sum of its proper divisors (58233).

142042231 is an equidigital number, since it uses as much as digits as its factorization.

142042231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58232.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142042231 is about 11918.1471294828. The cubic root of 142042231 is about 521.7620586318.

Adding to 142042231 its reverse (132240241), we get a palindrome (274282472).

The spelling of 142042231 in words is "one hundred forty-two million, forty-two thousand, two hundred thirty-one".