42172242 has 24 divisors (see below), whose sum is σ = 98115696. Its totient is φ = 12049128.

The previous prime is 42172219. The next prime is 42172297. The reversal of 42172242 is 24227124.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71428 + ... + 72015.

It is an arithmetic number, because the mean of its divisors is an integer number (4088154).

Almost surely, 2^42172242 is an apocalyptic number.

42172242 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42172242 is an abundant number, since it is smaller than the sum of its proper divisors (55943454).

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

42172242 is a wasteful number, since it uses less digits than its factorization.

42172242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143462 (or 143455 counting only the distinct ones).

The product of its digits is 1792, while the sum is 24.

The square root of 42172242 is about 6494.0158607752. The cubic root of 42172242 is about 348.0771892456.

Adding to 42172242 its reverse (24227124), we get a palindrome (66399366).

The spelling of 42172242 in words is "forty-two million, one hundred seventy-two thousand, two hundred forty-two".