142324421 has 4 divisors (see below), whose sum is σ = 149815200. Its totient is φ = 134833644.

The previous prime is 142324397. The next prime is 142324433. The reversal of 142324421 is 124423241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124423241 = 47 ⋅2647303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142324421 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 (142324471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3745361 + ... + 3745398.

It is an arithmetic number, because the mean of its divisors is an integer number (37453800).

Almost surely, 2^142324421 is an apocalyptic number.

It is an amenable number.

142324421 is a deficient number, since it is larger than the sum of its proper divisors (7490779).

142324421 is an equidigital number, since it uses as much as digits as its factorization.

142324421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490778.

The product of its digits is 1536, while the sum is 23.

The square root of 142324421 is about 11929.9799245430. The cubic root of 142324421 is about 522.1073518097.

Adding to 142324421 its reverse (124423241), we get a palindrome (266747662).

The spelling of 142324421 in words is "one hundred forty-two million, three hundred twenty-four thousand, four hundred twenty-one".