2161744 has 40 divisors (see below), whose sum is σ = 4756640. Its totient is φ = 943488.

The previous prime is 2161729. The next prime is 2161751. The reversal of 2161744 is 4471612.

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, 3679 + ... + 4225.

It is an arithmetic number, because the mean of its divisors is an integer number (118916).

2^2161744 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 2161744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2378320).

2161744 is an abundant number, since it is smaller than the sum of its proper divisors (2594896).

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

2161744 is a wasteful number, since it uses less digits than its factorization.

2161744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 581 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 2161744 is about 1470.2870468041. The cubic root of 2161744 is about 129.3008621734.

The spelling of 2161744 in words is "two million, one hundred sixty-one thousand, seven hundred forty-four".