142322421 has 8 divisors (see below), whose sum is σ = 190128160. Its totient is φ = 94699152.

The previous prime is 142322399. The next prime is 142322443. The reversal of 142322421 is 124223241.

It is an interprime number because it is at equal distance from previous prime (142322399) and next prime (142322443).

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

It is not a de Polignac number, because 142322421 - 2¹⁰ = 142321397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142322491) 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, 43786 + ... + 46923.

It is an arithmetic number, because the mean of its divisors is an integer number (23766020).

Almost surely, 2^142322421 is an apocalyptic number.

It is an amenable number.

142322421 is a deficient number, since it is larger than the sum of its proper divisors (47805739).

142322421 is an equidigital number, since it uses as much as digits as its factorization.

142322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91235.

The product of its digits is 768, while the sum is 21.

The square root of 142322421 is about 11929.8961018108. The cubic root of 142322421 is about 522.1049061774.

Adding to 142322421 its reverse (124223241), we get a palindrome (266545662).

It can be divided in two parts, 14232 and 2421, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 142322421 in words is "one hundred forty-two million, three hundred twenty-two thousand, four hundred twenty-one".