3243681 has 12 divisors (see below), whose sum is σ = 5354752. Its totient is φ = 1853496.

The previous prime is 3243677. The next prime is 3243683. The reversal of 3243681 is 1863423.

It is a happy number.

3243681 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 3243681 - 2² = 3243677 is a prime.

It is a super-2 number, since 2×3243681² = 21042932859522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3243683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25681 + ... + 25806.

Almost surely, 2^3243681 is an apocalyptic number.

It is an amenable number.

3243681 is a deficient number, since it is larger than the sum of its proper divisors (2111071).

3243681 is a wasteful number, since it uses less digits than its factorization.

3243681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51500 (or 51497 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 3243681 is about 1801.0222097465. The cubic root of 3243681 is about 148.0287410703.

It can be divided in two parts, 324 and 3681, that added together give a triangular number (4005 = T₈₉).

The spelling of 3243681 in words is "three million, two hundred forty-three thousand, six hundred eighty-one".