2756381 has 2 divisors, whose sum is σ = 2756382. Its totient is φ = 2756380.

The previous prime is 2756357. The next prime is 2756401. The reversal of 2756381 is 1836572.

It is a happy number.

2756381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2353156 + 403225 = 1534^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2756381 - 2¹⁸ = 2494237 is a prime.

It is a super-2 number, since 2×2756381² = 15195272434322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2756681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378190 + 1378191.

It is an arithmetic number, because the mean of its divisors is an integer number (1378191).

2^2756381 is an apocalyptic number.

It is an amenable number.

2756381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756381 is an equidigital number, since it uses as much as digits as its factorization.

2756381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 2756381 is about 1660.2352242981. The cubic root of 2756381 is about 140.2102453300.

The spelling of 2756381 in words is "two million, seven hundred fifty-six thousand, three hundred eighty-one".