42221671 has 8 divisors (see below), whose sum is σ = 42588000. Its totient is φ = 41857440.

The previous prime is 42221633. The next prime is 42221681. The reversal of 42221671 is 17612224.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42221671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221611) 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, 108345 + ... + 108733.

It is an arithmetic number, because the mean of its divisors is an integer number (5323500).

Almost surely, 2^42221671 is an apocalyptic number.

42221671 is a deficient number, since it is larger than the sum of its proper divisors (366329).

42221671 is a wasteful number, since it uses less digits than its factorization.

42221671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its digits is 1344, while the sum is 25.

The square root of 42221671 is about 6497.8204807458. The cubic root of 42221671 is about 348.2131269229.

Adding to 42221671 its reverse (17612224), we get a palindrome (59833895).

The spelling of 42221671 in words is "forty-two million, two hundred twenty-one thousand, six hundred seventy-one".