199542 has 16 divisors (see below), whose sum is σ = 456192. Its totient is φ = 57000.

The previous prime is 199523. The next prime is 199559. The reversal of 199542 is 245991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

199542 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 in 7 ways as a sum of consecutive naturals, for example, 2334 + ... + 2417.

It is an arithmetic number, because the mean of its divisors is an integer number (28512).

2¹⁹⁹⁵⁴² is an apocalyptic number.

199542 is an abundant number, since it is smaller than the sum of its proper divisors (256650).

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

199542 is a wasteful number, since it uses less digits than its factorization.

199542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763.

The product of its digits is 3240, while the sum is 30.

The square root of 199542 is about 446.7012424429. The cubic root of 199542 is about 58.4356806415.

It can be divided in two parts, 199 and 542, that added together give a triangular number (741 = T₃₈).

The spelling of 199542 in words is "one hundred ninety-nine thousand, five hundred forty-two".