42172570 has 64 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 14414400.

The previous prime is 42172541. The next prime is 42172591. The reversal of 42172570 is 7527124.

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, 199765 + ... + 199975.

It is an arithmetic number, because the mean of its divisors is an integer number (1373760).

Almost surely, 2^42172570 is an apocalyptic number.

42172570 is an abundant number, since it is smaller than the sum of its proper divisors (45748070).

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

42172570 is a wasteful number, since it uses less digits than its factorization.

42172570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42172570 is about 6494.0411147451. The cubic root of 42172570 is about 348.0780916482.

Adding to 42172570 its reverse (7527124), we get a palindrome (49699694).

The spelling of 42172570 in words is "forty-two million, one hundred seventy-two thousand, five hundred seventy".