865746 has 24 divisors (see below), whose sum is σ = 2144064. Its totient is φ = 247320.

The previous prime is 865741. The next prime is 865747. The reversal of 865746 is 647568.

It is a happy number.

865746 is a `hidden beast` number, since 86 + 574 + 6 = 666.

It is a super-2 number, since 2×865746² = 1499032273032, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 865746.

It is not an unprimeable number, because it can be changed into a prime (865741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3310 + ... + 3561.

It is an arithmetic number, because the mean of its divisors is an integer number (89336).

2⁸⁶⁵⁷⁴⁶ is an apocalyptic number.

865746 is an abundant number, since it is smaller than the sum of its proper divisors (1278318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865746 is a wasteful number, since it uses less digits than its factorization.

865746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886 (or 6883 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 865746 is about 930.4547275392. The cubic root of 865746 is about 95.3081774086.

It can be divided in two parts, 86 and 5746, that added together give a cube (5832 = 18³).

The spelling of 865746 in words is "eight hundred sixty-five thousand, seven hundred forty-six".