42209671 has 4 divisors (see below), whose sum is σ = 48239632. Its totient is φ = 36179712.

The previous prime is 42209639. The next prime is 42209683. The reversal of 42209671 is 17690224.

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 42209671 - 2⁵ = 42209639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42209611) 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, 3014970 + ... + 3014983.

It is an arithmetic number, because the mean of its divisors is an integer number (12059908).

Almost surely, 2^42209671 is an apocalyptic number.

42209671 is a deficient number, since it is larger than the sum of its proper divisors (6029961).

42209671 is an equidigital number, since it uses as much as digits as its factorization.

42209671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029960.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 42209671 is about 6496.8970285822. The cubic root of 42209671 is about 348.1801347544.

Adding to 42209671 its reverse (17690224), we get a palindrome (59899895).

The spelling of 42209671 in words is "forty-two million, two hundred nine thousand, six hundred seventy-one".