142542321 has 8 divisors (see below), whose sum is σ = 190315200. Its totient is φ = 94898832.

The previous prime is 142542319. The next prime is 142542329. The reversal of 142542321 is 123245241.

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

It is not a de Polignac number, because 142542321 - 2¹ = 142542319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142542291 and 142542300.

It is not an unprimeable number, because it can be changed into a prime (142542329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29746 + ... + 34203.

It is an arithmetic number, because the mean of its divisors is an integer number (23789400).

Almost surely, 2^142542321 is an apocalyptic number.

It is an amenable number.

142542321 is a deficient number, since it is larger than the sum of its proper divisors (47772879).

142542321 is an equidigital number, since it uses as much as digits as its factorization.

142542321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64695.

The product of its digits is 1920, while the sum is 24.

The square root of 142542321 is about 11939.1088863449. The cubic root of 142542321 is about 522.3736663348.

Adding to 142542321 its reverse (123245241), we get a palindrome (265787562).

The spelling of 142542321 in words is "one hundred forty-two million, five hundred forty-two thousand, three hundred twenty-one".