42618965 has 4 divisors (see below), whose sum is σ = 51142764. Its totient is φ = 34095168.

The previous prime is 42618941. The next prime is 42618971. The reversal of 42618965 is 56981624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20557156 + 22061809 = 4534^2 + 4697^2 .

It is a cyclic number.

It is not a de Polignac number, because 42618965 - 2¹⁰ = 42617941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4261892 + ... + 4261901.

It is an arithmetic number, because the mean of its divisors is an integer number (12785691).

Almost surely, 2^42618965 is an apocalyptic number.

It is an amenable number.

42618965 is a deficient number, since it is larger than the sum of its proper divisors (8523799).

42618965 is an equidigital number, since it uses as much as digits as its factorization.

42618965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523798.

The product of its digits is 103680, while the sum is 41.

The square root of 42618965 is about 6528.3202280525. The cubic root of 42618965 is about 349.3019146965.

It can be divided in two parts, 426 and 18965, that added together give a palindrome (19391).

The spelling of 42618965 in words is "forty-two million, six hundred eighteen thousand, nine hundred sixty-five".