2681081 has 4 divisors (see below), whose sum is σ = 2887332. Its totient is φ = 2474832.

The previous prime is 2681069. The next prime is 2681117. The reversal of 2681081 is 1801862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1801862 = 2 ⋅900931.

It can be written as a sum of positive squares in 2 ways, for example, as 1795600 + 885481 = 1340^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681081 - 2⁶ = 2681017 is a prime.

It is a super-2 number, since 2×2681081² = 14376390657122, which contains 22 as substring.

It is an Ulam number.

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 2681081.

It is not an unprimeable number, because it can be changed into a prime (2681381) 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, 103106 + ... + 103131.

It is an arithmetic number, because the mean of its divisors is an integer number (721833).

2^2681081 is an apocalyptic number.

It is an amenable number.

2681081 is a deficient number, since it is larger than the sum of its proper divisors (206251).

2681081 is a wasteful number, since it uses less digits than its factorization.

2681081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206250.

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

The square root of 2681081 is about 1637.4006840111. The cubic root of 2681081 is about 138.9216645374.

The spelling of 2681081 in words is "two million, six hundred eighty-one thousand, eighty-one".