42903 has 16 divisors (see below), whose sum is σ = 72960. Its totient is φ = 24408.

The previous prime is 42901. The next prime is 42923. The reversal of 42903 is 30924.

It is not a de Polignac number, because 42903 - 2¹ = 42901 is a prime.

It is an Ulam number.

42903 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76 + ... + 302.

It is an arithmetic number, because the mean of its divisors is an integer number (4560).

2⁴²⁹⁰³ is an apocalyptic number.

42903 is a deficient number, since it is larger than the sum of its proper divisors (30057).

42903 is a wasteful number, since it uses less digits than its factorization.

42903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 42903 is about 207.1303937137. The cubic root of 42903 is about 35.0076173897.

The spelling of 42903 in words is "forty-two thousand, nine hundred three".