42165317 has 4 divisors (see below), whose sum is σ = 42215040. Its totient is φ = 42115596.

The previous prime is 42165307. The next prime is 42165323. The reversal of 42165317 is 71356124.

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 42165317 - 2¹² = 42161221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42165317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165307) 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, 23567 + ... + 25292.

It is an arithmetic number, because the mean of its divisors is an integer number (10553760).

Almost surely, 2^42165317 is an apocalyptic number.

It is an amenable number.

42165317 is a deficient number, since it is larger than the sum of its proper divisors (49723).

42165317 is an equidigital number, since it uses as much as digits as its factorization.

42165317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49722.

The product of its digits is 5040, while the sum is 29.

The square root of 42165317 is about 6493.4826557095. The cubic root of 42165317 is about 348.0581359033.

The spelling of 42165317 in words is "forty-two million, one hundred sixty-five thousand, three hundred seventeen".