42106517 has 4 divisors (see below), whose sum is σ = 42129696. Its totient is φ = 42083340.

The previous prime is 42106513. The next prime is 42106541. The reversal of 42106517 is 71560124.

42106517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42106517 - 2² = 42106513 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 (42106513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609 + ... + 12582.

It is an arithmetic number, because the mean of its divisors is an integer number (10532424).

Almost surely, 2^42106517 is an apocalyptic number.

It is an amenable number.

42106517 is a deficient number, since it is larger than the sum of its proper divisors (23179).

42106517 is a wasteful number, since it uses less digits than its factorization.

42106517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23178.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 42106517 is about 6488.9534595341. The cubic root of 42106517 is about 347.8962703347.

The spelling of 42106517 in words is "forty-two million, one hundred six thousand, five hundred seventeen".