42017225 has 6 divisors (see below), whose sum is σ = 52101390. Its totient is φ = 33613760.

The previous prime is 42017219. The next prime is 42017231. The reversal of 42017225 is 52271024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42017219) and next prime (42017231).

It can be written as a sum of positive squares in 3 ways, for example, as 1006009 + 41011216 = 1003^2 + 6404^2 .

It is not a de Polignac number, because 42017225 - 2¹⁴ = 42000841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42017225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 840320 + ... + 840369.

It is an arithmetic number, because the mean of its divisors is an integer number (8683565).

Almost surely, 2^42017225 is an apocalyptic number.

It is an amenable number.

42017225 is a deficient number, since it is larger than the sum of its proper divisors (10084165).

42017225 is a wasteful number, since it uses less digits than its factorization.

42017225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680699 (or 1680694 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42017225 is about 6482.0694997817. The cubic root of 42017225 is about 347.6501774851.

Adding to 42017225 its reverse (52271024), we get a palindrome (94288249).

The spelling of 42017225 in words is "forty-two million, seventeen thousand, two hundred twenty-five".