2109801 has 4 divisors (see below), whose sum is σ = 2813072. Its totient is φ = 1406532.

The previous prime is 2109799. The next prime is 2109841. The reversal of 2109801 is 1089012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2109801 - 2¹ = 2109799 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351631 + ... + 351636.

It is an arithmetic number, because the mean of its divisors is an integer number (703268).

2^2109801 is an apocalyptic number.

It is an amenable number.

2109801 is a deficient number, since it is larger than the sum of its proper divisors (703271).

2109801 is an equidigital number, since it uses as much as digits as its factorization.

2109801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703270.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2109801 is about 1452.5154043934. The cubic root of 2109801 is about 128.2568288982.

It can be divided in two parts, 210 and 9801, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 2109801 in words is "two million, one hundred nine thousand, eight hundred one".