203542 has 4 divisors (see below), whose sum is σ = 305316. Its totient is φ = 101770.

The previous prime is 203531. The next prime is 203549. The reversal of 203542 is 245302.

203542 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: 245302 = 2 ⋅122651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203549) by changing a digit.

203542 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, 50884 + ... + 50887.

It is an arithmetic number, because the mean of its divisors is an integer number (76329).

2²⁰³⁵⁴² is an apocalyptic number.

203542 is a deficient number, since it is larger than the sum of its proper divisors (101774).

203542 is a wasteful number, since it uses less digits than its factorization.

203542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101773.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 203542 is about 451.1562922093. The cubic root of 203542 is about 58.8235656078.

Subtracting from 203542 its product of nonzero digits (240), we obtain a palindrome (203302).

Adding to 203542 its reverse (245302), we get a palindrome (448844).

The spelling of 203542 in words is "two hundred three thousand, five hundred forty-two".