42170370 has 64 divisors (see below), whose sum is σ = 116919936. Its totient is φ = 9620480.

The previous prime is 42170311. The next prime is 42170383. The reversal of 42170370 is 7307124.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42170370.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1852 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (1826874).

Almost surely, 2^42170370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42170370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58459968).

42170370 is an abundant number, since it is smaller than the sum of its proper divisors (74749566).

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

42170370 is a wasteful number, since it uses less digits than its factorization.

42170370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7555.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 42170370 is about 6493.8717264818. The cubic root of 42170370 is about 348.0720388583.

Adding to 42170370 its reverse (7307124), we get a palindrome (49477494).

The spelling of 42170370 in words is "forty-two million, one hundred seventy thousand, three hundred seventy".