865457 has 2 divisors, whose sum is σ = 865458. Its totient is φ = 865456.

The previous prime is 865409. The next prime is 865477. The reversal of 865457 is 754568.

865457 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., 541696 + 323761 = 736^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 865457 - 2⁸ = 865201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (865477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432728 + 432729.

It is an arithmetic number, because the mean of its divisors is an integer number (432729).

2⁸⁶⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

865457 is a deficient number, since it is larger than the sum of its proper divisors (1).

865457 is an equidigital number, since it uses as much as digits as its factorization.

865457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 865457 is about 930.2994141673. The cubic root of 865457 is about 95.2975710919.

Subtracting from 865457 its reverse (754568), we obtain a square (110889 = 333²).

The spelling of 865457 in words is "eight hundred sixty-five thousand, four hundred fifty-seven".