42173622 has 48 divisors (see below), whose sum is σ = 95764032. Its totient is φ = 13909320.

The previous prime is 42173611. The next prime is 42173623. The reversal of 42173622 is 22637124.

It is a super-2 number, since 2×42173622² = 3557228785197768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42173623) 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 23 ways as a sum of consecutive naturals, for example, 51597 + ... + 52407.

It is an arithmetic number, because the mean of its divisors is an integer number (1995084).

Almost surely, 2^42173622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42173622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47882016).

42173622 is an abundant number, since it is smaller than the sum of its proper divisors (53590410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42173622 is a wasteful number, since it uses less digits than its factorization.

42173622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 923 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 42173622 is about 6494.1221115714. The cubic root of 42173622 is about 348.0809859079.

The spelling of 42173622 in words is "forty-two million, one hundred seventy-three thousand, six hundred twenty-two".