6918145 has 8 divisors (see below), whose sum is σ = 8940456. Its totient is φ = 5108736.

The previous prime is 6918127. The next prime is 6918161. The reversal of 6918145 is 5418196.

It can be written as a sum of positive squares in 4 ways, for example, as 369664 + 6548481 = 608^2 + 2559^2 .

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 6918145 - 2⁷ = 6918017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6918145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53152 + ... + 53281.

It is an arithmetic number, because the mean of its divisors is an integer number (1117557).

It is a Proth number, since it is equal to 1689 ⋅ 2¹² + 1 and 1689 < 2¹².

Almost surely, 2^6918145 is an apocalyptic number.

6918145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6918145 is a deficient number, since it is larger than the sum of its proper divisors (2022311).

6918145 is a wasteful number, since it uses less digits than its factorization.

6918145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106451.

The product of its digits is 8640, while the sum is 34.

The square root of 6918145 is about 2630.2366813654. The cubic root of 6918145 is about 190.5445596284.

It can be divided in two parts, 691 and 8145, that added together give a square (8836 = 94²).

The spelling of 6918145 in words is "six million, nine hundred eighteen thousand, one hundred forty-five".