865247 has 2 divisors, whose sum is σ = 865248. Its totient is φ = 865246.

The previous prime is 865231. The next prime is 865253. The reversal of 865247 is 742568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865247 - 2⁴ = 865231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432623 + 432624.

It is an arithmetic number, because the mean of its divisors is an integer number (432624).

2⁸⁶⁵²⁴⁷ is an apocalyptic number.

865247 is a deficient number, since it is larger than the sum of its proper divisors (1).

865247 is an equidigital number, since it uses as much as digits as its factorization.

865247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 865247 is about 930.1865404315. The cubic root of 865247 is about 95.2898625984.

The spelling of 865247 in words is "eight hundred sixty-five thousand, two hundred forty-seven".