2191084 has 24 divisors (see below), whose sum is σ = 4474400. Its totient is φ = 938448.

The previous prime is 2191069. The next prime is 2191087. The reversal of 2191084 is 4801912.

It is a happy number.

2191084 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

2191084 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (2191087) 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, 574 + ... + 2170.

2^2191084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237200).

2191084 is an abundant number, since it is smaller than the sum of its proper divisors (2283316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191084 is a wasteful number, since it uses less digits than its factorization.

2191084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2191084 is about 1480.2310630439. The cubic root of 2191084 is about 129.8832087162.

Adding to 2191084 its reverse (4801912), we get a palindrome (6992996).

The spelling of 2191084 in words is "two million, one hundred ninety-one thousand, eighty-four".