42640203 has 8 divisors (see below), whose sum is σ = 56964816. Its totient is φ = 28371200.

The previous prime is 42640201. The next prime is 42640217. The reversal of 42640203 is 30204624.

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 42640203 - 2¹ = 42640201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42640203.

It is not an unprimeable number, because it can be changed into a prime (42640201) 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, 12078 + ... + 15203.

It is an arithmetic number, because the mean of its divisors is an integer number (7120602).

Almost surely, 2^42640203 is an apocalyptic number.

42640203 is a deficient number, since it is larger than the sum of its proper divisors (14324613).

42640203 is a wasteful number, since it uses less digits than its factorization.

42640203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27805.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 42640203 is about 6529.9466307161. The cubic root of 42640203 is about 349.3599267586.

Adding to 42640203 its reverse (30204624), we get a palindrome (72844827).

The spelling of 42640203 in words is "forty-two million, six hundred forty thousand, two hundred three".