42172533 has 48 divisors (see below), whose sum is σ = 70412160. Its totient is φ = 24105600.

The previous prime is 42172531. The next prime is 42172541. The reversal of 42172533 is 33527124.

It is not a de Polignac number, because 42172533 - 2¹ = 42172531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42172497 and 42172506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42172531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135448 + ... + 135758.

It is an arithmetic number, because the mean of its divisors is an integer number (1466920).

Almost surely, 2^42172533 is an apocalyptic number.

It is an amenable number.

42172533 is a deficient number, since it is larger than the sum of its proper divisors (28239627).

42172533 is a wasteful number, since it uses less digits than its factorization.

42172533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 407 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 42172533 is about 6494.0382659790. The cubic root of 42172533 is about 348.0779898530.

Adding to 42172533 its reverse (33527124), we get a palindrome (75699657).

The spelling of 42172533 in words is "forty-two million, one hundred seventy-two thousand, five hundred thirty-three".