865497 has 4 divisors (see below), whose sum is σ = 1154000. Its totient is φ = 576996.

The previous prime is 865493. The next prime is 865499. The reversal of 865497 is 794568.

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 not a de Polignac number, because 865497 - 2² = 865493 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144247 + ... + 144252.

It is an arithmetic number, because the mean of its divisors is an integer number (288500).

2⁸⁶⁵⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

865497 is a deficient number, since it is larger than the sum of its proper divisors (288503).

865497 is a wasteful number, since it uses less digits than its factorization.

865497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288502.

The product of its digits is 60480, while the sum is 39.

The square root of 865497 is about 930.3209123738. The cubic root of 865497 is about 95.2990392350.

The spelling of 865497 in words is "eight hundred sixty-five thousand, four hundred ninety-seven".