42172572 has 24 divisors (see below), whose sum is σ = 105972496. Its totient is φ = 12976128.

The previous prime is 42172541. The next prime is 42172591. The reversal of 42172572 is 27527124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135013 + ... + 135324.

Almost surely, 2^42172572 is an apocalyptic number.

It is an amenable number.

42172572 is an abundant number, since it is smaller than the sum of its proper divisors (63799924).

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

42172572 is a wasteful number, since it uses less digits than its factorization.

42172572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270357 (or 270355 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 42172572 is about 6494.0412687324. The cubic root of 42172572 is about 348.0780971506.

Adding to 42172572 its reverse (27527124), we get a palindrome (69699696).

The spelling of 42172572 in words is "forty-two million, one hundred seventy-two thousand, five hundred seventy-two".