2186081 has 8 divisors (see below), whose sum is σ = 2415744. Its totient is φ = 1967680.

The previous prime is 2186059. The next prime is 2186087. The reversal of 2186081 is 1806812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2186081 is a prime.

It is a super-2 number, since 2×2186081² = 9557900277122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2186081.

It is not an unprimeable number, because it can be changed into a prime (2186087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405 + ... + 3186.

It is an arithmetic number, because the mean of its divisors is an integer number (301968).

2^2186081 is an apocalyptic number.

It is an amenable number.

2186081 is a deficient number, since it is larger than the sum of its proper divisors (229663).

2186081 is a wasteful number, since it uses less digits than its factorization.

2186081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2186081 is about 1478.5401583995. The cubic root of 2186081 is about 129.7842773352.

The spelling of 2186081 in words is "two million, one hundred eighty-six thousand, eighty-one".