42003645 has 16 divisors (see below), whose sum is σ = 67460352. Its totient is φ = 22317120.

The previous prime is 42003641. The next prime is 42003683. The reversal of 42003645 is 54630024.

42003645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42003645 - 2² = 42003641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42003641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1102 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (4216272).

Almost surely, 2^42003645 is an apocalyptic number.

It is an amenable number.

42003645 is a deficient number, since it is larger than the sum of its proper divisors (25456707).

42003645 is a wasteful number, since it uses less digits than its factorization.

42003645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 42003645 is about 6481.0219101620. The cubic root of 42003645 is about 347.6127198463.

Adding to 42003645 its reverse (54630024), we get a palindrome (96633669).

The spelling of 42003645 in words is "forty-two million, three thousand, six hundred forty-five".