6840265 has 4 divisors (see below), whose sum is σ = 8208324. Its totient is φ = 5472208.

The previous prime is 6840263. The next prime is 6840271. The reversal of 6840265 is 5620486.

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 1628176 + 5212089 = 1276^2 + 2283^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840265 - 2¹ = 6840263 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6840263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684022 + ... + 684031.

It is an arithmetic number, because the mean of its divisors is an integer number (2052081).

Almost surely, 2^6840265 is an apocalyptic number.

It is an amenable number.

6840265 is a deficient number, since it is larger than the sum of its proper divisors (1368059).

6840265 is a wasteful number, since it uses less digits than its factorization.

6840265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368058.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 6840265 is about 2615.3900282749. The cubic root of 6840265 is about 189.8268505649.

The spelling of 6840265 in words is "six million, eight hundred forty thousand, two hundred sixty-five".