2721726 has 24 divisors (see below), whose sum is σ = 6739824. Its totient is φ = 777600.

The previous prime is 2721721. The next prime is 2721727. The reversal of 2721726 is 6271272.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2721726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10675 + ... + 10926.

It is an arithmetic number, because the mean of its divisors is an integer number (280826).

2^2721726 is an apocalyptic number.

2721726 is an abundant number, since it is smaller than the sum of its proper divisors (4018098).

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

2721726 is a wasteful number, since it uses less digits than its factorization.

2721726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21616 (or 21613 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 2721726 is about 1649.7654378729. The cubic root of 2721726 is about 139.6201608526.

Adding to 2721726 its reverse (6271272), we get a palindrome (8992998).

The spelling of 2721726 in words is "two million, seven hundred twenty-one thousand, seven hundred twenty-six".