2054681 has 4 divisors (see below), whose sum is σ = 2057652. Its totient is φ = 2051712.

The previous prime is 2054639. The next prime is 2054687. The reversal of 2054681 is 1864502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 259081 + 1795600 = 509^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2054681 - 2⁶ = 2054617 is a prime.

It is a super-2 number, since 2×2054681² = 8443428023522, which contains 22 as substring.

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 2054681.

It is not an unprimeable number, because it can be changed into a prime (2054687) 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, 161 + ... + 2033.

It is an arithmetic number, because the mean of its divisors is an integer number (514413).

2^2054681 is an apocalyptic number.

It is an amenable number.

2054681 is a deficient number, since it is larger than the sum of its proper divisors (2971).

2054681 is a wasteful number, since it uses less digits than its factorization.

2054681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2054681 is about 1433.4158503379. The cubic root of 2054681 is about 127.1300257579.

The spelling of 2054681 in words is "two million, fifty-four thousand, six hundred eighty-one".