2102091 has 8 divisors (see below), whose sum is σ = 2834640. Its totient is φ = 1385472.

The previous prime is 2102083. The next prime is 2102099. The reversal of 2102091 is 1902012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2102083) and next prime (2102099).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102091 - 2³ = 2102083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102091.

It is not an unprimeable number, because it can be changed into a prime (2102099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3670 + ... + 4203.

It is an arithmetic number, because the mean of its divisors is an integer number (354330).

2^2102091 is an apocalyptic number.

2102091 is a deficient number, since it is larger than the sum of its proper divisors (732549).

2102091 is an equidigital number, since it uses as much as digits as its factorization.

2102091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2102091 is about 1449.8589586577. The cubic root of 2102091 is about 128.1004054319.

The spelling of 2102091 in words is "two million, one hundred two thousand, ninety-one".