42042503 has 4 divisors (see below), whose sum is σ = 42091320. Its totient is φ = 41993688.

The previous prime is 42042491. The next prime is 42042509. The reversal of 42042503 is 30524024.

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 42042503 - 2⁶ = 42042439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042509) 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, 23093 + ... + 24846.

It is an arithmetic number, because the mean of its divisors is an integer number (10522830).

Almost surely, 2^42042503 is an apocalyptic number.

42042503 is a deficient number, since it is larger than the sum of its proper divisors (48817).

42042503 is an equidigital number, since it uses as much as digits as its factorization.

42042503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48816.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42042503 is about 6484.0190468567. The cubic root of 42042503 is about 347.7198801644.

Adding to 42042503 its reverse (30524024), we get a palindrome (72566527).

The spelling of 42042503 in words is "forty-two million, forty-two thousand, five hundred three".