2845681 has 4 divisors (see below), whose sum is σ = 3013092. Its totient is φ = 2678272.

The previous prime is 2845673. The next prime is 2845693. The reversal of 2845681 is 1865482.

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 1245456 + 1600225 = 1116^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2845681 - 2³ = 2845673 is a prime.

It is a super-2 number, since 2×2845681² = 16195800707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2845631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83680 + ... + 83713.

It is an arithmetic number, because the mean of its divisors is an integer number (753273).

2^2845681 is an apocalyptic number.

It is an amenable number.

2845681 is a deficient number, since it is larger than the sum of its proper divisors (167411).

2845681 is a wasteful number, since it uses less digits than its factorization.

2845681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167410.

The product of its digits is 15360, while the sum is 34.

The square root of 2845681 is about 1686.9146392156. The cubic root of 2845681 is about 141.7083380679.

The spelling of 2845681 in words is "two million, eight hundred forty-five thousand, six hundred eighty-one".