42321043 has 4 divisors (see below), whose sum is σ = 42456568. Its totient is φ = 42185520.

The previous prime is 42321029. The next prime is 42321049. The reversal of 42321043 is 34012324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42321043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42321043.

It is not an unprimeable number, because it can be changed into a prime (42321049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67293 + ... + 67918.

It is an arithmetic number, because the mean of its divisors is an integer number (10614142).

Almost surely, 2^42321043 is an apocalyptic number.

42321043 is a deficient number, since it is larger than the sum of its proper divisors (135525).

42321043 is a wasteful number, since it uses less digits than its factorization.

42321043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135524.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42321043 is about 6505.4625508107. The cubic root of 42321043 is about 348.4860951467.

Adding to 42321043 its reverse (34012324), we get a palindrome (76333367).

The spelling of 42321043 in words is "forty-two million, three hundred twenty-one thousand, forty-three".