199942146 has 12 divisors (see below), whose sum is σ = 433208022. Its totient is φ = 66647376.

The previous prime is 199942139. The next prime is 199942159. The reversal of 199942146 is 641249991.

It can be written as a sum of positive squares in only one way, i.e., 193515921 + 6426225 = 13911^2 + 2535^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5553931 + ... + 5553966.

Almost surely, 2^199942146 is an apocalyptic number.

199942146 is an abundant number, since it is smaller than the sum of its proper divisors (233265876).

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

199942146 is a wasteful number, since it uses less digits than its factorization.

199942146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11107905 (or 11107902 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 199942146 is about 14140.0900280019. The cubic root of 199942146 is about 584.7471534971.

The spelling of 199942146 in words is "one hundred ninety-nine million, nine hundred forty-two thousand, one hundred forty-six".