199142 has 4 divisors (see below), whose sum is σ = 298716. Its totient is φ = 99570.

The previous prime is 199109. The next prime is 199151. The reversal of 199142 is 241991.

199142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241991 = 89 ⋅2719.

It is a plaindrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 199142.

It is an unprimeable number.

199142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49784 + ... + 49787.

It is an arithmetic number, because the mean of its divisors is an integer number (74679).

2¹⁹⁹¹⁴² is an apocalyptic number.

199142 is a deficient number, since it is larger than the sum of its proper divisors (99574).

199142 is an equidigital number, since it uses as much as digits as its factorization.

199142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99573.

The product of its digits is 648, while the sum is 26.

The square root of 199142 is about 446.2532913044. The cubic root of 199142 is about 58.3966079846.

Subtracting 199142 from its reverse (241991), we obtain a square (42849 = 207²).

The spelling of 199142 in words is "one hundred ninety-nine thousand, one hundred forty-two".