2100859 has 2 divisors, whose sum is σ = 2100860. Its totient is φ = 2100858.

The previous prime is 2100841. The next prime is 2100869. The reversal of 2100859 is 9580012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100859 - 2¹³ = 2092667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050429 + 1050430.

It is an arithmetic number, because the mean of its divisors is an integer number (1050430).

2^2100859 is an apocalyptic number.

2100859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100859 is an equidigital number, since it uses as much as digits as its factorization.

2100859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2100859 is about 1449.4340274742. The cubic root of 2100859 is about 128.0753747138.

The spelling of 2100859 in words is "two million, one hundred thousand, eight hundred fifty-nine".