142422847 has 4 divisors (see below), whose sum is σ = 162768976. Its totient is φ = 122076720.

The previous prime is 142422829. The next prime is 142422887. The reversal of 142422847 is 748224241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748224241 = 349 ⋅2143909.

It is a cyclic number.

It is not a de Polignac number, because 142422847 - 2¹¹ = 142420799 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 (142422887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10173054 + ... + 10173067.

It is an arithmetic number, because the mean of its divisors is an integer number (40692244).

Almost surely, 2^142422847 is an apocalyptic number.

142422847 is a deficient number, since it is larger than the sum of its proper divisors (20346129).

142422847 is an equidigital number, since it uses as much as digits as its factorization.

142422847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20346128.

The product of its digits is 28672, while the sum is 34.

The square root of 142422847 is about 11934.1043652215. The cubic root of 142422847 is about 522.2276804134.

The spelling of 142422847 in words is "one hundred forty-two million, four hundred twenty-two thousand, eight hundred forty-seven".