2101959 has 6 divisors (see below), whose sum is σ = 3036176. Its totient is φ = 1401300.

The previous prime is 2101909. The next prime is 2101961. The reversal of 2101959 is 9591012.

It is a happy number.

It is not a de Polignac number, because 2101959 - 2⁸ = 2101703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116767 + ... + 116784.

2^2101959 is an apocalyptic number.

2101959 is a deficient number, since it is larger than the sum of its proper divisors (934217).

2101959 is a wasteful number, since it uses less digits than its factorization.

2101959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233557 (or 233554 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2101959 is about 1449.8134362738. The cubic root of 2101959 is about 128.0977240371.

The spelling of 2101959 in words is "two million, one hundred one thousand, nine hundred fifty-nine".