2001726 has 32 divisors (see below), whose sum is σ = 4684800. Its totient is φ = 631800.

The previous prime is 2001721. The next prime is 2001731. The reversal of 2001726 is 6271002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2001721) and next prime (2001731).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2001699 and 2001708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001721) 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 15 ways as a sum of consecutive naturals, for example, 51 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (146400).

2^2001726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2342400).

2001726 is an abundant number, since it is smaller than the sum of its proper divisors (2683074).

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

2001726 is a wasteful number, since it uses less digits than its factorization.

2001726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2001726 is about 1414.8236639242. The cubic root of 2001726 is about 126.0283382972.

Adding to 2001726 its reverse (6271002), we get a palindrome (8272728).

The spelling of 2001726 in words is "two million, one thousand, seven hundred twenty-six".