866273 has 4 divisors (see below), whose sum is σ = 868608. Its totient is φ = 863940.

The previous prime is 866231. The next prime is 866279. The reversal of 866273 is 372668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866273 - 2¹² = 862177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473 + ... + 1398.

It is an arithmetic number, because the mean of its divisors is an integer number (217152).

2⁸⁶⁶²⁷³ is an apocalyptic number.

It is an amenable number.

866273 is a deficient number, since it is larger than the sum of its proper divisors (2335).

866273 is a wasteful number, since it uses less digits than its factorization.

866273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334.

The product of its digits is 12096, while the sum is 32.

The square root of 866273 is about 930.7378793194. The cubic root of 866273 is about 95.3275122640.

The spelling of 866273 in words is "eight hundred sixty-six thousand, two hundred seventy-three".