42581603 has 8 divisors (see below), whose sum is σ = 44932800. Its totient is φ = 40241448.

The previous prime is 42581593. The next prime is 42581633. The reversal of 42581603 is 30618524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42581603 - 2⁸ = 42581347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42581633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5888 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (5616600).

Almost surely, 2^42581603 is an apocalyptic number.

42581603 is a deficient number, since it is larger than the sum of its proper divisors (2351197).

42581603 is a wasteful number, since it uses less digits than its factorization.

42581603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42581603 is about 6525.4580682125. The cubic root of 42581603 is about 349.1998127831.

It can be divided in two parts, 425 and 81603, that added together give a palindrome (82028).

The spelling of 42581603 in words is "forty-two million, five hundred eighty-one thousand, six hundred three".