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6864145 = 51372829
BaseRepresentation
bin11010001011110100010001
3110220201211121
4122023310101
53224123040
6403042241
7112226041
oct32136421
913821747
106864145
113969152
122370381
131564432
14ca9721
15908c4a
hex68bd11

6864145 has 4 divisors (see below), whose sum is σ = 8236980. Its totient is φ = 5491312.

The previous prime is 6864139. The next prime is 6864167. The reversal of 6864145 is 5414686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414686 = 22707343.

It can be written as a sum of positive squares in 2 ways, for example, as 693889 + 6170256 = 833^2 + 2484^2 .

It is a cyclic number.

It is not a de Polignac number, because 6864145 - 217 = 6733073 is a prime.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6864145.

It is an unprimeable number.

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, 686410 + ... + 686419.

It is an arithmetic number, because the mean of its divisors is an integer number (2059245).

Almost surely, 26864145 is an apocalyptic number.

It is an amenable number.

6864145 is a deficient number, since it is larger than the sum of its proper divisors (1372835).

6864145 is a wasteful number, since it uses less digits than its factorization.

6864145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372834.

The product of its digits is 23040, while the sum is 34.

The square root of 6864145 is about 2619.9513354259. The cubic root of 6864145 is about 190.0474950517.

It can be divided in two parts, 68641 and 45, that added together give a palindrome (68686).

The spelling of 6864145 in words is "six million, eight hundred sixty-four thousand, one hundred forty-five".

Divisors: 1 5 1372829 6864145