2191002 has 32 divisors (see below), whose sum is σ = 4847040. Its totient is φ = 654720.

The previous prime is 2191001. The next prime is 2191019. The reversal of 2191002 is 2001912.

It is a happy number.

2191002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2191001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5688 + ... + 6060.

It is an arithmetic number, because the mean of its divisors is an integer number (151470).

2^2191002 is an apocalyptic number.

2191002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2423520).

2191002 is an abundant number, since it is smaller than the sum of its proper divisors (2656038).

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

2191002 is a wasteful number, since it uses less digits than its factorization.

2191002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2191002 is about 1480.2033644064. The cubic root of 2191002 is about 129.8815884291.

Adding to 2191002 its reverse (2001912), we get a palindrome (4192914).

It can be divided in two parts, 219 and 1002, that added together give a palindrome (1221).

The spelling of 2191002 in words is "two million, one hundred ninety-one thousand, two".