2094781 has 4 divisors (see below), whose sum is σ = 2255932. Its totient is φ = 1933632.

The previous prime is 2094779. The next prime is 2094787. The reversal of 2094781 is 1874902.

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 1229881 + 864900 = 1109^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2094781 - 2¹ = 2094779 is a prime.

It is a super-2 number, since 2×2094781² = 8776214875922, which contains 22 as substring.

It is a Duffinian number.

2094781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2094787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80556 + ... + 80581.

It is an arithmetic number, because the mean of its divisors is an integer number (563983).

2^2094781 is an apocalyptic number.

It is an amenable number.

2094781 is a deficient number, since it is larger than the sum of its proper divisors (161151).

2094781 is a wasteful number, since it uses less digits than its factorization.

2094781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161150.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2094781 is about 1447.3358283412. The cubic root of 2094781 is about 127.9517436911.

The spelling of 2094781 in words is "two million, ninety-four thousand, seven hundred eighty-one".