866234 has 4 divisors (see below), whose sum is σ = 1299354. Its totient is φ = 433116.

The previous prime is 866231. The next prime is 866279. The reversal of 866234 is 432668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 10609 = 925^2 + 103^2 .

It is a super-2 number, since 2×866234² = 1500722685512, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 866197 and 866206.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866234.

It is not an unprimeable number, because it can be changed into a prime (866231) 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 as a sum of consecutive naturals, namely, 216557 + ... + 216560.

2⁸⁶⁶²³⁴ is an apocalyptic number.

866234 is a deficient number, since it is larger than the sum of its proper divisors (433120).

866234 is a wasteful number, since it uses less digits than its factorization.

866234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433119.

The product of its digits is 6912, while the sum is 29.

The square root of 866234 is about 930.7169279647. The cubic root of 866234 is about 95.3260816801.

The spelling of 866234 in words is "eight hundred sixty-six thousand, two hundred thirty-four".