42645603 has 48 divisors (see below), whose sum is σ = 76982528. Its totient is φ = 20433600.

The previous prime is 42645601. The next prime is 42645607. The reversal of 42645603 is 30654624.

It is not a de Polignac number, because 42645603 - 2¹ = 42645601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42645601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32388 + ... + 33678.

Almost surely, 2^42645603 is an apocalyptic number.

42645603 is a deficient number, since it is larger than the sum of its proper divisors (34336925).

42645603 is a wasteful number, since it uses less digits than its factorization.

42645603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 42645603 is about 6530.3600972688. The cubic root of 42645603 is about 349.3746739052.

The spelling of 42645603 in words is "forty-two million, six hundred forty-five thousand, six hundred three".