864265 has 4 divisors (see below), whose sum is σ = 1037124. Its totient is φ = 691408.

The previous prime is 864251. The next prime is 864277. The reversal of 864265 is 562468.

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 145161 + 719104 = 381^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 864265 - 2⁷ = 864137 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86422 + ... + 86431.

It is an arithmetic number, because the mean of its divisors is an integer number (259281).

2⁸⁶⁴²⁶⁵ is an apocalyptic number.

It is an amenable number.

864265 is a deficient number, since it is larger than the sum of its proper divisors (172859).

864265 is a wasteful number, since it uses less digits than its factorization.

864265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172858.

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

The square root of 864265 is about 929.6585394649. The cubic root of 864265 is about 95.2537996523.

The spelling of 864265 in words is "eight hundred sixty-four thousand, two hundred sixty-five".