867145 has 4 divisors (see below), whose sum is σ = 1040580. Its totient is φ = 693712.

The previous prime is 867143. The next prime is 867151. The reversal of 867145 is 541768.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 558009 + 309136 = 747^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 867145 - 2¹ = 867143 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

867145 is a lucky number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (867143) 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, 86710 + ... + 86719.

It is an arithmetic number, because the mean of its divisors is an integer number (260145).

2⁸⁶⁷¹⁴⁵ is an apocalyptic number.

It is an amenable number.

867145 is a deficient number, since it is larger than the sum of its proper divisors (173435).

867145 is a wasteful number, since it uses less digits than its factorization.

867145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173434.

The product of its digits is 6720, while the sum is 31.

The square root of 867145 is about 931.2062070240. The cubic root of 867145 is about 95.3594874476.

The spelling of 867145 in words is "eight hundred sixty-seven thousand, one hundred forty-five".