2102659 has 4 divisors (see below), whose sum is σ = 2264416. Its totient is φ = 1940904.

The previous prime is 2102651. The next prime is 2102687. The reversal of 2102659 is 9562012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102659 - 2³ = 2102651 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 (2102651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80859 + ... + 80884.

It is an arithmetic number, because the mean of its divisors is an integer number (566104).

2^2102659 is an apocalyptic number.

2102659 is a deficient number, since it is larger than the sum of its proper divisors (161757).

2102659 is a wasteful number, since it uses less digits than its factorization.

2102659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161756.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2102659 is about 1450.0548265497. The cubic root of 2102659 is about 128.1119422743. Note that the first 3 decimals are identical.

The spelling of 2102659 in words is "two million, one hundred two thousand, six hundred fifty-nine".