42821673 has 8 divisors (see below), whose sum is σ = 57531936. Its totient is φ = 28329600.

The previous prime is 42821629. The next prime is 42821683. The reversal of 42821673 is 37612824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42821673 - 2¹³ = 42813481 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (42821683) 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 7 ways as a sum of consecutive naturals, for example, 54088 + ... + 54873.

It is an arithmetic number, because the mean of its divisors is an integer number (7191492).

Almost surely, 2^42821673 is an apocalyptic number.

It is an amenable number.

42821673 is a deficient number, since it is larger than the sum of its proper divisors (14710263).

42821673 is a wasteful number, since it uses less digits than its factorization.

42821673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109095.

The product of its digits is 16128, while the sum is 33.

The square root of 42821673 is about 6543.8270912364. The cubic root of 42821673 is about 349.8548323149.

The spelling of 42821673 in words is "forty-two million, eight hundred twenty-one thousand, six hundred seventy-three".