142225161 has 24 divisors (see below), whose sum is σ = 206722656. Its totient is φ = 86935680.

The previous prime is 142225147. The next prime is 142225177. The reversal of 142225161 is 161522241.

It is not a de Polignac number, because 142225161 - 2⁷ = 142225033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142225361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81781 + ... + 83501.

It is an arithmetic number, because the mean of its divisors is an integer number (8613444).

Almost surely, 2^142225161 is an apocalyptic number.

It is an amenable number.

142225161 is a deficient number, since it is larger than the sum of its proper divisors (64497495).

142225161 is a wasteful number, since it uses less digits than its factorization.

142225161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913 (or 1900 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 142225161 is about 11925.8190913664. The cubic root of 142225161 is about 521.9859474205.

The spelling of 142225161 in words is "one hundred forty-two million, two hundred twenty-five thousand, one hundred sixty-one".