42517207 has 4 divisors (see below), whose sum is σ = 42530256. Its totient is φ = 42504160.

The previous prime is 42517159. The next prime is 42517217. The reversal of 42517207 is 70271524.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42517207 - 2¹¹ = 42515159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42517217) 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, 2943 + ... + 9679.

It is an arithmetic number, because the mean of its divisors is an integer number (10632564).

Almost surely, 2^42517207 is an apocalyptic number.

42517207 is a deficient number, since it is larger than the sum of its proper divisors (13049).

42517207 is an equidigital number, since it uses as much as digits as its factorization.

42517207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42517207 is about 6520.5219883074. The cubic root of 42517207 is about 349.0236927783.

It can be divided in two parts, 42517 and 207, that added together give a palindrome (42724).

The spelling of 42517207 in words is "forty-two million, five hundred seventeen thousand, two hundred seven".