142422161 has 16 divisors (see below), whose sum is σ = 170294400. Its totient is φ = 116527488.

The previous prime is 142422131. The next prime is 142422167. The reversal of 142422161 is 161224241.

It is a de Polignac number, because none of the positive numbers 2^k-142422161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142422167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14126 + ... + 22008.

It is an arithmetic number, because the mean of its divisors is an integer number (10643400).

Almost surely, 2^142422161 is an apocalyptic number.

It is an amenable number.

142422161 is a deficient number, since it is larger than the sum of its proper divisors (27872239).

142422161 is an equidigital number, since it uses as much as digits as its factorization.

142422161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008.

The product of its digits is 768, while the sum is 23.

The square root of 142422161 is about 11934.0756240272. The cubic root of 142422161 is about 522.2268419506.

The spelling of 142422161 in words is "one hundred forty-two million, four hundred twenty-two thousand, one hundred sixty-one".