42442172 has 12 divisors (see below), whose sum is σ = 74320176. Its totient is φ = 21207840.

The previous prime is 42442171. The next prime is 42442187. The reversal of 42442172 is 27124424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442171) 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, 8897 + ... + 12807.

It is an arithmetic number, because the mean of its divisors is an integer number (6193348).

Almost surely, 2^42442172 is an apocalyptic number.

It is an amenable number.

42442172 is a deficient number, since it is larger than the sum of its proper divisors (31878004).

42442172 is a wasteful number, since it uses less digits than its factorization.

42442172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628 (or 6626 counting only the distinct ones).

The product of its digits is 3584, while the sum is 26.

The square root of 42442172 is about 6514.7656903376. The cubic root of 42442172 is about 348.8182511387.

Adding to 42442172 its reverse (27124424), we get a palindrome (69566596).

The spelling of 42442172 in words is "forty-two million, four hundred forty-two thousand, one hundred seventy-two".