2191072 has 48 divisors (see below), whose sum is σ = 4868640. Its totient is φ = 963072.

The previous prime is 2191069. The next prime is 2191087. The reversal of 2191072 is 2701912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9454 + ... + 9682.

It is an arithmetic number, because the mean of its divisors is an integer number (101430).

2^2191072 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 2191072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2434320).

2191072 is an abundant number, since it is smaller than the sum of its proper divisors (2677568).

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

2191072 is a wasteful number, since it uses less digits than its factorization.

2191072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2191072 is about 1480.2270096171. The cubic root of 2191072 is about 129.8829716036.

Adding to 2191072 its reverse (2701912), we get a palindrome (4892984).

The spelling of 2191072 in words is "two million, one hundred ninety-one thousand, seventy-two".