203842 has 4 divisors (see below), whose sum is σ = 305766. Its totient is φ = 101920.

The previous prime is 203821. The next prime is 203843. The reversal of 203842 is 248302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 441 = 451^2 + 21^2 .

It is a pancake number, because a pancake can be divided into 203842 parts by 638 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (203843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50959 + ... + 50962.

2²⁰³⁸⁴² is an apocalyptic number.

203842 is a deficient number, since it is larger than the sum of its proper divisors (101924).

203842 is a wasteful number, since it uses less digits than its factorization.

203842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101923.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 203842 is about 451.4886488053. The cubic root of 203842 is about 58.8524513853.

It can be divided in two parts, 2038 and 42, that added together give a triangular number (2080 = T₆₄).

The spelling of 203842 in words is "two hundred three thousand, eight hundred forty-two".