865481 has 2 divisors, whose sum is σ = 865482. Its totient is φ = 865480.

The previous prime is 865477. The next prime is 865483. The reversal of 865481 is 184568.

865481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 99856 = 875^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 865481 - 2² = 865477 is a prime.

It is a super-2 number, since 2×865481² = 1498114722722, which contains 22 as substring.

Together with 865483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (865483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432740 + 432741.

It is an arithmetic number, because the mean of its divisors is an integer number (432741).

2⁸⁶⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

865481 is a deficient number, since it is larger than the sum of its proper divisors (1).

865481 is an equidigital number, since it uses as much as digits as its factorization.

865481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 865481 is about 930.3123131508. The cubic root of 865481 is about 95.2984519831.

The spelling of 865481 in words is "eight hundred sixty-five thousand, four hundred eighty-one".