142122189 has 8 divisors (see below), whose sum is σ = 206723232. Its totient is φ = 86134640.

The previous prime is 142122187. The next prime is 142122269. The reversal of 142122189 is 981221241.

It is a happy number.

142122189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142122189 - 2¹ = 142122187 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142122187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2153334 + ... + 2153399.

It is an arithmetic number, because the mean of its divisors is an integer number (25840404).

Almost surely, 2^142122189 is an apocalyptic number.

It is an amenable number.

142122189 is a deficient number, since it is larger than the sum of its proper divisors (64601043).

142122189 is a wasteful number, since it uses less digits than its factorization.

142122189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306747.

The product of its digits is 2304, while the sum is 30.

The square root of 142122189 is about 11921.5011219225. The cubic root of 142122189 is about 521.8599431945.

It can be divided in two parts, 142122 and 189, that added together give a triangular number (142311 = T₅₃₃).

The spelling of 142122189 in words is "one hundred forty-two million, one hundred twenty-two thousand, one hundred eighty-nine".