865461 has 8 divisors (see below), whose sum is σ = 1180960. Its totient is φ = 563472.

The previous prime is 865457. The next prime is 865477. The reversal of 865461 is 164568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 865461 - 2² = 865457 is a prime.

It is a Duffinian number.

865461 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865481) 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 7 ways as a sum of consecutive naturals, for example, 3226 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (147620).

2⁸⁶⁵⁴⁶¹ is an apocalyptic number.

It is an amenable number.

865461 is a deficient number, since it is larger than the sum of its proper divisors (315499).

865461 is a wasteful number, since it uses less digits than its factorization.

865461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6755.

The product of its digits is 5760, while the sum is 30.

The square root of 865461 is about 930.3015640103. The cubic root of 865461 is about 95.2977179082.

It can be divided in two parts, 865 and 461, that added together give a triangular number (1326 = T₅₁).

The spelling of 865461 in words is "eight hundred sixty-five thousand, four hundred sixty-one".