42173000 has 64 divisors (see below), whose sum is σ = 99655920. Its totient is φ = 16704000.

The previous prime is 42172997. The next prime is 42173057. The reversal of 42173000 is 37124.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4153444 + 38019556 = 2038^2 + 6166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42173000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180884 + ... + 181116.

Almost surely, 2^42173000 is an apocalyptic number.

42173000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42173000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49827960).

42173000 is an abundant number, since it is smaller than the sum of its proper divisors (57482920).

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

42173000 is a wasteful number, since it uses less digits than its factorization.

42173000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 42173000 is about 6494.0742219349. The cubic root of 42173000 is about 348.0792746689.

The spelling of 42173000 in words is "forty-two million, one hundred seventy-three thousand".