142122188 has 12 divisors (see below), whose sum is σ = 267845760. Its totient is φ = 65594832.

The previous prime is 142122187. The next prime is 142122269. The reversal of 142122188 is 881221241.

It is a self number, because there is not a number n which added to its sum of digits gives 142122188.

It is not an unprimeable number, because it can be changed into a prime (142122187) 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 3 ways as a sum of consecutive naturals, for example, 1366508 + ... + 1366611.

It is an arithmetic number, because the mean of its divisors is an integer number (22320480).

Almost surely, 2^142122188 is an apocalyptic number.

It is an amenable number.

142122188 is a deficient number, since it is larger than the sum of its proper divisors (125723572).

142122188 is a wasteful number, since it uses less digits than its factorization.

142122188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733136 (or 2733134 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 142122188 is about 11921.5010799815. The cubic root of 142122188 is about 521.8599419705.

The spelling of 142122188 in words is "one hundred forty-two million, one hundred twenty-two thousand, one hundred eighty-eight".