142321389 has 8 divisors (see below), whose sum is σ = 216870720. Its totient is φ = 81326496.

The previous prime is 142321369. The next prime is 142321397. The reversal of 142321389 is 983123241.

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

It is not a de Polignac number, because 142321389 - 2²³ = 133932781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142321339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3388584 + ... + 3388625.

It is an arithmetic number, because the mean of its divisors is an integer number (27108840).

Almost surely, 2^142321389 is an apocalyptic number.

It is an amenable number.

142321389 is a deficient number, since it is larger than the sum of its proper divisors (74549331).

142321389 is an equidigital number, since it uses as much as digits as its factorization.

142321389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6777219.

The product of its digits is 10368, while the sum is 33.

The square root of 142321389 is about 11929.8528490506. The cubic root of 142321389 is about 522.1036442222.

The spelling of 142321389 in words is "one hundred forty-two million, three hundred twenty-one thousand, three hundred eighty-nine".