142044421 has 4 divisors (see below), whose sum is σ = 142073344. Its totient is φ = 142015500.

The previous prime is 142044403. The next prime is 142044431. The reversal of 142044421 is 124440241.

142044421 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, and also an emirpimes, since its reverse is a distinct semiprime: 124440241 = 157 ⋅792613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142044421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142044392 and 142044401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142044431) 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, 5055 + ... + 17596.

It is an arithmetic number, because the mean of its divisors is an integer number (35518336).

Almost surely, 2^142044421 is an apocalyptic number.

It is an amenable number.

142044421 is a deficient number, since it is larger than the sum of its proper divisors (28923).

142044421 is an equidigital number, since it uses as much as digits as its factorization.

142044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28922.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 142044421 is about 11918.2390058263. The cubic root of 142044421 is about 521.7647401184.

Adding to 142044421 its reverse (124440241), we get a palindrome (266484662).

The spelling of 142044421 in words is "one hundred forty-two million, forty-four thousand, four hundred twenty-one".