65117285 has 4 divisors (see below), whose sum is σ = 78140748. Its totient is φ = 52093824.

The previous prime is 65117281. The next prime is 65117323. The reversal of 65117285 is 58271156.

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 34492129 + 30625156 = 5873^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 65117285 - 2² = 65117281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65117281) 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, 6511724 + ... + 6511733.

It is an arithmetic number, because the mean of its divisors is an integer number (19535187).

Almost surely, 2^65117285 is an apocalyptic number.

It is an amenable number.

65117285 is a deficient number, since it is larger than the sum of its proper divisors (13023463).

65117285 is a wasteful number, since it uses less digits than its factorization.

65117285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13023462.

The product of its digits is 16800, while the sum is 35.

The square root of 65117285 is about 8069.5281770374. The cubic root of 65117285 is about 402.3142617424.

The spelling of 65117285 in words is "sixty-five million, one hundred seventeen thousand, two hundred eighty-five".