2440681 has 2 divisors, whose sum is σ = 2440682. Its totient is φ = 2440680.

The previous prime is 2440679. The next prime is 2440693. The reversal of 2440681 is 1860442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 1175056 = 1125^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440681 - 2¹ = 2440679 is a prime.

It is a super-2 number, since 2×2440681² = 11913847487522, which contains 22 as substring.

Together with 2440679, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (2440621) 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, 1220340 + 1220341.

It is an arithmetic number, because the mean of its divisors is an integer number (1220341).

2^2440681 is an apocalyptic number.

It is an amenable number.

2440681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440681 is an equidigital number, since it uses as much as digits as its factorization.

2440681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2440681 is about 1562.2679027619. The cubic root of 2440681 is about 134.6388334411.

The spelling of 2440681 in words is "two million, four hundred forty thousand, six hundred eighty-one".