42865617 has 4 divisors (see below), whose sum is σ = 57154160. Its totient is φ = 28577076.

The previous prime is 42865579. The next prime is 42865621. The reversal of 42865617 is 71656824.

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 not a de Polignac number, because 42865617 - 2¹⁶ = 42800081 is a prime.

It is a super-2 number, since 2×42865617² = 3674922241581378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42865657) 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, 7144267 + ... + 7144272.

It is an arithmetic number, because the mean of its divisors is an integer number (14288540).

Almost surely, 2^42865617 is an apocalyptic number.

It is an amenable number.

42865617 is a deficient number, since it is larger than the sum of its proper divisors (14288543).

42865617 is a wasteful number, since it uses less digits than its factorization.

42865617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14288542.

The product of its digits is 80640, while the sum is 39.

The square root of 42865617 is about 6547.1838984406. The cubic root of 42865617 is about 349.9744661645.

The spelling of 42865617 in words is "forty-two million, eight hundred sixty-five thousand, six hundred seventeen".