142344421 has 4 divisors (see below), whose sum is σ = 144349344. Its totient is φ = 140339500.

The previous prime is 142344413. The next prime is 142344427. The reversal of 142344421 is 124443241.

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.

It is a cyclic number.

It is not a de Polignac number, because 142344421 - 2³ = 142344413 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 (142344427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002355 + ... + 1002496.

It is an arithmetic number, because the mean of its divisors is an integer number (36087336).

Almost surely, 2^142344421 is an apocalyptic number.

It is an amenable number.

142344421 is a deficient number, since it is larger than the sum of its proper divisors (2004923).

142344421 is an equidigital number, since it uses as much as digits as its factorization.

142344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004922.

The product of its digits is 3072, while the sum is 25.

The square root of 142344421 is about 11930.8181194753. The cubic root of 142344421 is about 522.1318068725.

Adding to 142344421 its reverse (124443241), we get a palindrome (266787662).

The spelling of 142344421 in words is "one hundred forty-two million, three hundred forty-four thousand, four hundred twenty-one".