7005865 has 8 divisors (see below), whose sum is σ = 8490888. Its totient is φ = 5548800.

The previous prime is 7005863. The next prime is 7005877. The reversal of 7005865 is 5685007.

It can be written as a sum of positive squares in 4 ways, for example, as 2214144 + 4791721 = 1488^2 + 2189^2 .

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

It is not a de Polignac number, because 7005865 - 2¹ = 7005863 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7005863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6432 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (1061361).

Almost surely, 2^7005865 is an apocalyptic number.

It is an amenable number.

7005865 is a deficient number, since it is larger than the sum of its proper divisors (1485023).

7005865 is a wasteful number, since it uses less digits than its factorization.

7005865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13979.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 7005865 is about 2646.8594598127. The cubic root of 7005865 is about 191.3465287984.

The spelling of 7005865 in words is "seven million, five thousand, eight hundred sixty-five".