42280843 has 4 divisors (see below), whose sum is σ = 46124568. Its totient is φ = 38437120.

The previous prime is 42280817. The next prime is 42280873. The reversal of 42280843 is 34808224.

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

It is a cyclic number.

It is not a de Polignac number, because 42280843 - 2⁹ = 42280331 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42280873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921846 + ... + 1921867.

It is an arithmetic number, because the mean of its divisors is an integer number (11531142).

Almost surely, 2^42280843 is an apocalyptic number.

42280843 is a deficient number, since it is larger than the sum of its proper divisors (3843725).

42280843 is a wasteful number, since it uses less digits than its factorization.

42280843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843724.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 42280843 is about 6502.3721056242. The cubic root of 42280843 is about 348.3757199602.

The spelling of 42280843 in words is "forty-two million, two hundred eighty thousand, eight hundred forty-three".