42103 has 4 divisors (see below), whose sum is σ = 42768. Its totient is φ = 41440.

The previous prime is 42101. The next prime is 42131. The reversal of 42103 is 30124.

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

It is a cyclic number.

It is not a de Polignac number, because 42103 - 2¹ = 42101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (10692).

2⁴²¹⁰³ is an apocalyptic number.

42103 is a deficient number, since it is larger than the sum of its proper divisors (665).

42103 is an equidigital number, since it uses as much as digits as its factorization.

42103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 42103 is about 205.1901557093. The cubic root of 42103 is about 34.7886583907.

Adding to 42103 its reverse (30124), we get a palindrome (72227).

The spelling of 42103 in words is "forty-two thousand, one hundred three", and thus it is an iban number.