868261 has 4 divisors (see below), whose sum is σ = 870912. Its totient is φ = 865612.

The previous prime is 868249. The next prime is 868267. The reversal of 868261 is 162868.

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 868261 - 2⁵ = 868229 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868267) 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 in 3 ways as a sum of consecutive naturals, for example, 751 + ... + 1516.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

2⁸⁶⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

868261 is a deficient number, since it is larger than the sum of its proper divisors (2651).

868261 is a wasteful number, since it uses less digits than its factorization.

868261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650.

The product of its digits is 4608, while the sum is 31.

The square root of 868261 is about 931.8052371606. The cubic root of 868261 is about 95.4003785583.

The spelling of 868261 in words is "eight hundred sixty-eight thousand, two hundred sixty-one".