2166441 has 4 divisors (see below), whose sum is σ = 2888592. Its totient is φ = 1444292.

The previous prime is 2166431. The next prime is 2166449. The reversal of 2166441 is 1446612.

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 2166441 - 2⁹ = 2165929 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2166449) 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, 361071 + ... + 361076.

It is an arithmetic number, because the mean of its divisors is an integer number (722148).

2^2166441 is an apocalyptic number.

It is an amenable number.

2166441 is a deficient number, since it is larger than the sum of its proper divisors (722151).

2166441 is an equidigital number, since it uses as much as digits as its factorization.

2166441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722150.

The product of its digits is 1152, while the sum is 24.

The square root of 2166441 is about 1471.8834872367. The cubic root of 2166441 is about 129.3944419894.

The spelling of 2166441 in words is "two million, one hundred sixty-six thousand, four hundred forty-one".