2123801 has 4 divisors (see below), whose sum is σ = 2235600. Its totient is φ = 2012004.

The previous prime is 2123791. The next prime is 2123831. The reversal of 2123801 is 1083212.

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 a cyclic number.

It is not a de Polignac number, because 2123801 - 2¹⁰ = 2122777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123801.

It is not an unprimeable number, because it can be changed into a prime (2123831) 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, 55871 + ... + 55908.

It is an arithmetic number, because the mean of its divisors is an integer number (558900).

2^2123801 is an apocalyptic number.

It is an amenable number.

2123801 is a deficient number, since it is larger than the sum of its proper divisors (111799).

2123801 is a wasteful number, since it uses less digits than its factorization.

2123801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111798.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2123801 is about 1457.3266620768. The cubic root of 2123801 is about 128.5398948533.

The spelling of 2123801 in words is "two million, one hundred twenty-three thousand, eight hundred one".