42431603 has 4 divisors (see below), whose sum is σ = 42480648. Its totient is φ = 42382560.

The previous prime is 42431567. The next prime is 42431651. The reversal of 42431603 is 30613424.

It is a happy number.

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 42431603 - 2¹⁸ = 42169459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42431663) 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, 23201 + ... + 24962.

It is an arithmetic number, because the mean of its divisors is an integer number (10620162).

Almost surely, 2^42431603 is an apocalyptic number.

42431603 is a deficient number, since it is larger than the sum of its proper divisors (49045).

42431603 is an equidigital number, since it uses as much as digits as its factorization.

42431603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49044.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 42431603 is about 6513.9544824937. The cubic root of 42431603 is about 348.7892943567.

It can be divided in two parts, 42431 and 603, that added together give a palindrome (43034).

The spelling of 42431603 in words is "forty-two million, four hundred thirty-one thousand, six hundred three".