42217125 has 32 divisors (see below), whose sum is σ = 70996224. Its totient is φ = 22276800.

The previous prime is 42217081. The next prime is 42217157. The reversal of 42217125 is 52171224.

It is not a de Polignac number, because 42217125 - 2⁸ = 42216869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42217095 and 42217104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38079 + ... + 39171.

It is an arithmetic number, because the mean of its divisors is an integer number (2218632).

Almost surely, 2^42217125 is an apocalyptic number.

It is an amenable number.

42217125 is a deficient number, since it is larger than the sum of its proper divisors (28779099).

42217125 is a wasteful number, since it uses less digits than its factorization.

42217125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1204 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 42217125 is about 6497.4706617268. The cubic root of 42217125 is about 348.2006291253.

Adding to 42217125 its reverse (52171224), we get a palindrome (94388349).

The spelling of 42217125 in words is "forty-two million, two hundred seventeen thousand, one hundred twenty-five".