42008503 has 4 divisors (see below), whose sum is σ = 43363648. Its totient is φ = 40653360.

The previous prime is 42008497. The next prime is 42008537. The reversal of 42008503 is 30580024.

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 42008503 - 2²¹ = 39911351 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 (42008543) 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, 677526 + ... + 677587.

It is an arithmetic number, because the mean of its divisors is an integer number (10840912).

Almost surely, 2^42008503 is an apocalyptic number.

42008503 is a deficient number, since it is larger than the sum of its proper divisors (1355145).

42008503 is a wasteful number, since it uses less digits than its factorization.

42008503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355144.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42008503 is about 6481.3966859003. The cubic root of 42008503 is about 347.6261205682.

Adding to 42008503 its reverse (30580024), we get a palindrome (72588527).

The spelling of 42008503 in words is "forty-two million, eight thousand, five hundred three".