865946 has 8 divisors (see below), whose sum is σ = 1375380. Its totient is φ = 407488.

The previous prime is 865937. The next prime is 865957. The reversal of 865946 is 649568.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 75625 = 889^2 + 275^2 .

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

It is a Curzon number.

It is an unprimeable number.

865946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 12701 + ... + 12768.

2⁸⁶⁵⁹⁴⁶ is an apocalyptic number.

865946 is a deficient number, since it is larger than the sum of its proper divisors (509434).

865946 is a wasteful number, since it uses less digits than its factorization.

865946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25488.

The product of its digits is 51840, while the sum is 38.

The square root of 865946 is about 930.5621956645. The cubic root of 865946 is about 95.3155160382.

The spelling of 865946 in words is "eight hundred sixty-five thousand, nine hundred forty-six".