865145 has 8 divisors (see below), whose sum is σ = 1083456. Its totient is φ = 661936.

The previous prime is 865121. The next prime is 865153. The reversal of 865145 is 541568.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 865145 - 2¹⁰ = 864121 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3647 + ... + 3876.

It is an arithmetic number, because the mean of its divisors is an integer number (135432).

2⁸⁶⁵¹⁴⁵ is an apocalyptic number.

It is an amenable number.

865145 is a deficient number, since it is larger than the sum of its proper divisors (218311).

865145 is a wasteful number, since it uses less digits than its factorization.

865145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551.

The product of its digits is 4800, while the sum is 29.

The square root of 865145 is about 930.1317111033. The cubic root of 865145 is about 95.2861180230.

The spelling of 865145 in words is "eight hundred sixty-five thousand, one hundred forty-five".