42665513 has 8 divisors (see below), whose sum is σ = 46660320. Its totient is φ = 38690080.

The previous prime is 42665489. The next prime is 42665527. The reversal of 42665513 is 31556624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42665513 - 2²⁰ = 41616937 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 42665513.

It is not an unprimeable number, because it can be changed into a prime (42665593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20 + ... + 9237.

It is an arithmetic number, because the mean of its divisors is an integer number (5832540).

Almost surely, 2^42665513 is an apocalyptic number.

It is an amenable number.

42665513 is a deficient number, since it is larger than the sum of its proper divisors (3994807).

42665513 is a wasteful number, since it uses less digits than its factorization.

42665513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9687.

The product of its digits is 21600, while the sum is 32.

The square root of 42665513 is about 6531.8843376165. The cubic root of 42665513 is about 349.4290364266.

Subtracting from 42665513 its reverse (31556624), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 4266 and 5513, that added together give a palindrome (9779).

The spelling of 42665513 in words is "forty-two million, six hundred sixty-five thousand, five hundred thirteen".