2117801 has 8 divisors (see below), whose sum is σ = 2446080. Its totient is φ = 1795968.

The previous prime is 2117777. The next prime is 2117813. The reversal of 2117801 is 1087112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2117821) 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 7 ways as a sum of consecutive naturals, for example, 881 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (305760).

2^2117801 is an apocalyptic number.

It is an amenable number.

2117801 is a deficient number, since it is larger than the sum of its proper divisors (328279).

2117801 is an equidigital number, since it uses as much as digits as its factorization.

2117801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 2117801 is about 1455.2666422343. The cubic root of 2117801 is about 128.4187336596.

The spelling of 2117801 in words is "two million, one hundred seventeen thousand, eight hundred one".