199920142 has 16 divisors (see below), whose sum is σ = 310782240. Its totient is φ = 96338592.

The previous prime is 199920121. The next prime is 199920151. The reversal of 199920142 is 241029991.

199920142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32743 + ... + 38365.

It is an arithmetic number, because the mean of its divisors is an integer number (19423890).

Almost surely, 2^199920142 is an apocalyptic number.

199920142 is a deficient number, since it is larger than the sum of its proper divisors (110862098).

199920142 is a wasteful number, since it uses less digits than its factorization.

199920142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 199920142 is about 14139.3119351686. The cubic root of 199920142 is about 584.7257018778.

The spelling of 199920142 in words is "one hundred ninety-nine million, nine hundred twenty thousand, one hundred forty-two".