2158859 has 2 divisors, whose sum is σ = 2158860. Its totient is φ = 2158858.

The previous prime is 2158843. The next prime is 2158889. The reversal of 2158859 is 9588512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2158859 - 2⁴ = 2158843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2158889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079429 + 1079430.

It is an arithmetic number, because the mean of its divisors is an integer number (1079430).

2^2158859 is an apocalyptic number.

2158859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158859 is an equidigital number, since it uses as much as digits as its factorization.

2158859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 38.

The square root of 2158859 is about 1469.3056183109. The cubic root of 2158859 is about 129.2433161894.

The spelling of 2158859 in words is "two million, one hundred fifty-eight thousand, eight hundred fifty-nine".