11721682 has 20 divisors (see below), whose sum is σ = 20520126. Its totient is φ = 5021520.

The previous prime is 11721679. The next prime is 11721691. The reversal of 11721682 is 28612711.

It can be written as a sum of positive squares in only one way, i.e., 11431161 + 290521 = 3381^2 + 539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11721682.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3582 + ... + 6022.

Almost surely, 2^11721682 is an apocalyptic number.

11721682 is a deficient number, since it is larger than the sum of its proper divisors (8798444).

11721682 is an frugal number, since it uses more digits than its factorization.

11721682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471 (or 2450 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 11721682 is about 3423.6942036344. The cubic root of 11721682 is about 227.1590158047.

It can be divided in two parts, 11721 and 682, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 11721682 in words is "eleven million, seven hundred twenty-one thousand, six hundred eighty-two".