142432421 has 4 divisors (see below), whose sum is σ = 142488192. Its totient is φ = 142376652.

The previous prime is 142432397. The next prime is 142432429. The reversal of 142432421 is 124234241.

142432421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142432421 - 2²² = 138238117 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 (142432429) 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, 23861 + ... + 29226.

It is an arithmetic number, because the mean of its divisors is an integer number (35622048).

Almost surely, 2^142432421 is an apocalyptic number.

It is an amenable number.

142432421 is a deficient number, since it is larger than the sum of its proper divisors (55771).

142432421 is an equidigital number, since it uses as much as digits as its factorization.

142432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55770.

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

The square root of 142432421 is about 11934.5054778152. The cubic root of 142432421 is about 522.2393819437.

Adding to 142432421 its reverse (124234241), we get a palindrome (266666662).

The spelling of 142432421 in words is "one hundred forty-two million, four hundred thirty-two thousand, four hundred twenty-one".