42513172 has 12 divisors (see below), whose sum is σ = 80121076. Its totient is φ = 19621440.

The previous prime is 42513169. The next prime is 42513173. The reversal of 42513172 is 27131524.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11532816 + 30980356 = 3396^2 + 5566^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42513173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408729 + ... + 408832.

Almost surely, 2^42513172 is an apocalyptic number.

It is an amenable number.

42513172 is a deficient number, since it is larger than the sum of its proper divisors (37607904).

42513172 is a wasteful number, since it uses less digits than its factorization.

42513172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817578 (or 817576 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 42513172 is about 6520.2125732218. The cubic root of 42513172 is about 349.0126513258.

Adding to 42513172 its reverse (27131524), we get a palindrome (69644696).

The spelling of 42513172 in words is "forty-two million, five hundred thirteen thousand, one hundred seventy-two".