42209673 has 8 divisors (see below), whose sum is σ = 61395936. Its totient is φ = 25581600.

The previous prime is 42209639. The next prime is 42209683. The reversal of 42209673 is 37690224.

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

It is not a de Polignac number, because 42209673 - 2²¹ = 40112521 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 a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1279081 = 42209673 / (4 + 2 + 2 + 0 + 9 + 6 + 7 + 3).

It is not an unprimeable number, because it can be changed into a prime (42209683) 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, 639508 + ... + 639573.

It is an arithmetic number, because the mean of its divisors is an integer number (7674492).

Almost surely, 2^42209673 is an apocalyptic number.

It is an amenable number.

42209673 is a deficient number, since it is larger than the sum of its proper divisors (19186263).

42209673 is a wasteful number, since it uses less digits than its factorization.

42209673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279095.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 42209673 is about 6496.8971825018. The cubic root of 42209673 is about 348.1801402536.

Adding to 42209673 its reverse (37690224), we get a palindrome (79899897).

The spelling of 42209673 in words is "forty-two million, two hundred nine thousand, six hundred seventy-three".