868251 has 4 divisors (see below), whose sum is σ = 1157672. Its totient is φ = 578832.

The previous prime is 868249. The next prime is 868267. The reversal of 868251 is 152868.

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

It is not a de Polignac number, because 868251 - 2¹ = 868249 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868251.

It is not an unprimeable number, because it can be changed into a prime (868211) 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, 144706 + ... + 144711.

It is an arithmetic number, because the mean of its divisors is an integer number (289418).

2⁸⁶⁸²⁵¹ is an apocalyptic number.

868251 is a deficient number, since it is larger than the sum of its proper divisors (289421).

868251 is a wasteful number, since it uses less digits than its factorization.

868251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289420.

The product of its digits is 3840, while the sum is 30.

The square root of 868251 is about 931.7998712170. The cubic root of 868251 is about 95.4000123061.

The spelling of 868251 in words is "eight hundred sixty-eight thousand, two hundred fifty-one".