42503 has 4 divisors (see below), whose sum is σ = 44760. Its totient is φ = 40248.

The previous prime is 42499. The next prime is 42509. The reversal of 42503 is 30524.

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 42503 - 2² = 42499 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42509) 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 in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (11190).

2⁴²⁵⁰³ is an apocalyptic number.

42503 is a deficient number, since it is larger than the sum of its proper divisors (2257).

42503 is a wasteful number, since it uses less digits than its factorization.

42503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 42503 is about 206.1625572212. The cubic root of 42503 is about 34.8984813366.

It can be divided in two parts, 42 and 503, that added together give a palindrome (545).

The spelling of 42503 in words is "forty-two thousand, five hundred three".