142056323421 has 4 divisors (see below), whose sum is σ = 189408431232. Its totient is φ = 94704215612.

The previous prime is 142056323413. The next prime is 142056323459. The reversal of 142056323421 is 124323650241.

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 142056323421 - 2³ = 142056323413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142056323471) 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, 23676053901 + ... + 23676053906.

It is an arithmetic number, because the mean of its divisors is an integer number (47352107808).

Almost surely, 2^142056323421 is an apocalyptic number.

It is an amenable number.

142056323421 is a deficient number, since it is larger than the sum of its proper divisors (47352107811).

142056323421 is an equidigital number, since it uses as much as digits as its factorization.

142056323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47352107810.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 142056323421 its reverse (124323650241), we get a palindrome (266379973662).

The spelling of 142056323421 in words is "one hundred forty-two billion, fifty-six million, three hundred twenty-three thousand, four hundred twenty-one".