2746781 has 2 divisors, whose sum is σ = 2746782. Its totient is φ = 2746780.

The previous prime is 2746753. The next prime is 2746787. The reversal of 2746781 is 1876472.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 372100 = 1541^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 2746781 - 2⁶ = 2746717 is a prime.

It is a super-2 number, since 2×2746781² = 15089611723922, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₉₉₇₈₁ and since 2746781 and 199781 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2746787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1373390 + 1373391.

It is an arithmetic number, because the mean of its divisors is an integer number (1373391).

2^2746781 is an apocalyptic number.

It is an amenable number.

2746781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2746781 is an equidigital number, since it uses as much as digits as its factorization.

2746781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 2746781 is about 1657.3415459705. The cubic root of 2746781 is about 140.0472799495.

The spelling of 2746781 in words is "two million, seven hundred forty-six thousand, seven hundred eighty-one".