2035681 has 2 divisors, whose sum is σ = 2035682. Its totient is φ = 2035680.

The previous prime is 2035669. The next prime is 2035687. The reversal of 2035681 is 1865302.

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., 2005056 + 30625 = 1416^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 2035681 - 2⁹ = 2035169 is a prime.

It is a super-2 number, since 2×2035681² = 8287994267522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2035687) 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, 1017840 + 1017841.

It is an arithmetic number, because the mean of its divisors is an integer number (1017841).

2^2035681 is an apocalyptic number.

It is an amenable number.

2035681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2035681 is an equidigital number, since it uses as much as digits as its factorization.

2035681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2035681 is about 1426.7729321795. The cubic root of 2035681 is about 126.7369469938.

The spelling of 2035681 in words is "two million, thirty-five thousand, six hundred eighty-one".