142191228 has 12 divisors (see below), whose sum is σ = 331779560. Its totient is φ = 47397072.

The previous prime is 142191197. The next prime is 142191229. The reversal of 142191228 is 822191241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 142191195 and 142191204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142191229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5924623 + ... + 5924646.

Almost surely, 2^142191228 is an apocalyptic number.

It is an amenable number.

142191228 is an abundant number, since it is smaller than the sum of its proper divisors (189588332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142191228 is a wasteful number, since it uses less digits than its factorization.

142191228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11849276 (or 11849274 counting only the distinct ones).

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

The square root of 142191228 is about 11924.3963369220. The cubic root of 142191228 is about 521.9444311893.

The spelling of 142191228 in words is "one hundred forty-two million, one hundred ninety-one thousand, two hundred twenty-eight".