6817145 has 4 divisors (see below), whose sum is σ = 8180580. Its totient is φ = 5453712.

The previous prime is 6817121. The next prime is 6817157. The reversal of 6817145 is 5417186.

It is a happy number.

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 1308736 + 5508409 = 1144^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 6817145 - 2⁶ = 6817081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681710 + ... + 681719.

It is an arithmetic number, because the mean of its divisors is an integer number (2045145).

Almost surely, 2^6817145 is an apocalyptic number.

It is an amenable number.

6817145 is a deficient number, since it is larger than the sum of its proper divisors (1363435).

6817145 is a wasteful number, since it uses less digits than its factorization.

6817145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363434.

The product of its digits is 6720, while the sum is 32.

The square root of 6817145 is about 2610.9662962206. The cubic root of 6817145 is about 189.6127384517.

The spelling of 6817145 in words is "six million, eight hundred seventeen thousand, one hundred forty-five".