2105641 has 2 divisors, whose sum is σ = 2105642. Its totient is φ = 2105640.

The previous prime is 2105611. The next prime is 2105669. The reversal of 2105641 is 1465012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 32041 = 1440^2 + 179^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105641 - 2⁷ = 2105513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2105611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052820 + 1052821.

It is an arithmetic number, because the mean of its divisors is an integer number (1052821).

2^2105641 is an apocalyptic number.

It is an amenable number.

2105641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105641 is an equidigital number, since it uses as much as digits as its factorization.

2105641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2105641 is about 1451.0826992284. The cubic root of 2105641 is about 128.1724766350.

Subtracting from 2105641 its product of nonzero digits (240), we obtain a square (2105401 = 1451²).

The spelling of 2105641 in words is "two million, one hundred five thousand, six hundred forty-one".