142438 has 8 divisors (see below), whose sum is σ = 215280. Its totient is φ = 70680.

The previous prime is 142433. The next prime is 142453. The reversal of 142438 is 834241.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142433) by changing a digit.

142438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (26910).

2¹⁴²⁴³⁸ is an apocalyptic number.

142438 is a deficient number, since it is larger than the sum of its proper divisors (72842).

142438 is a wasteful number, since it uses less digits than its factorization.

142438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 768, while the sum is 22.

The square root of 142438 is about 377.4095918230. The cubic root of 142438 is about 52.2246200465.

Adding to 142438 its reverse (834241), we get a palindrome (976679).

The spelling of 142438 in words is "one hundred forty-two thousand, four hundred thirty-eight".