2118261 has 8 divisors (see below), whose sum is σ = 2915584. Its totient is φ = 1366560.

The previous prime is 2118239. The next prime is 2118269. The reversal of 2118261 is 1628112.

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

It is not a de Polignac number, because 2118261 - 2¹⁰ = 2117237 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 (2118269) 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, 11296 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (364448).

2^2118261 is an apocalyptic number.

It is an amenable number.

2118261 is a deficient number, since it is larger than the sum of its proper divisors (797323).

2118261 is a wasteful number, since it uses less digits than its factorization.

2118261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22811.

The product of its digits is 192, while the sum is 21.

The square root of 2118261 is about 1455.4246802909. The cubic root of 2118261 is about 128.4280307781.

The spelling of 2118261 in words is "two million, one hundred eighteen thousand, two hundred sixty-one".