42308643 has 12 divisors (see below), whose sum is σ = 61085400. Its totient is φ = 26035776.

The previous prime is 42308641. The next prime is 42308657. The reversal of 42308643 is 34680324.

It is not a de Polignac number, because 42308643 - 2¹ = 42308641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42308643.

It is not an unprimeable number, because it can be changed into a prime (42308641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41218 + ... + 42231.

It is an arithmetic number, because the mean of its divisors is an integer number (5090450).

Almost surely, 2^42308643 is an apocalyptic number.

42308643 is a deficient number, since it is larger than the sum of its proper divisors (18776757).

42308643 is a wasteful number, since it uses less digits than its factorization.

42308643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83478 (or 83465 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 42308643 is about 6504.5094357684. The cubic root of 42308643 is about 348.4520565269.

Adding to 42308643 its reverse (34680324), we get a palindrome (76988967).

The spelling of 42308643 in words is "forty-two million, three hundred eight thousand, six hundred forty-three".