42170722 has 32 divisors (see below), whose sum is σ = 71616960. Its totient is φ = 18457920.

The previous prime is 42170701. The next prime is 42170729. The reversal of 42170722 is 22707124.

It is not an unprimeable number, because it can be changed into a prime (42170729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68488 + ... + 69100.

It is an arithmetic number, because the mean of its divisors is an integer number (2238030).

Almost surely, 2^42170722 is an apocalyptic number.

42170722 is a deficient number, since it is larger than the sum of its proper divisors (29446238).

42170722 is a wasteful number, since it uses less digits than its factorization.

42170722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 42170722 is about 6493.8988289009. The cubic root of 42170722 is about 348.0730073188.

Adding to 42170722 its reverse (22707124), we get a palindrome (64877846).

The spelling of 42170722 in words is "forty-two million, one hundred seventy thousand, seven hundred twenty-two".