142239 has 8 divisors (see below), whose sum is σ = 200880. Its totient is φ = 89216.

The previous prime is 142237. The next prime is 142271. The reversal of 142239 is 932241.

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

It is not a de Polignac number, because 142239 - 2¹ = 142237 is a prime.

It is a super-3 number, since 3×142239³ = 8633309805593757, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (25110).

2¹⁴²²³⁹ is an apocalyptic number.

142239 is a deficient number, since it is larger than the sum of its proper divisors (58641).

142239 is a wasteful number, since it uses less digits than its factorization.

142239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809.

The product of its digits is 432, while the sum is 21.

The square root of 142239 is about 377.1458603777. The cubic root of 142239 is about 52.2002877217.

The spelling of 142239 in words is "one hundred forty-two thousand, two hundred thirty-nine".