3543681 has 16 divisors (see below), whose sum is σ = 4866048. Its totient is φ = 2293200.

The previous prime is 3543677. The next prime is 3543721. The reversal of 3543681 is 1863453.

It is not a de Polignac number, because 3543681 - 2² = 3543677 is a prime.

It is a super-2 number, since 2×3543681² = 25115350059522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3543611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26986 + ... + 27116.

It is an arithmetic number, because the mean of its divisors is an integer number (304128).

Almost surely, 2^3543681 is an apocalyptic number.

It is an amenable number.

3543681 is a deficient number, since it is larger than the sum of its proper divisors (1322367).

3543681 is a wasteful number, since it uses less digits than its factorization.

3543681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its digits is 8640, while the sum is 30.

The square root of 3543681 is about 1882.4667327738. The cubic root of 3543681 is about 152.4584640082.

It can be divided in two parts, 3543 and 681, that added together give a palindrome (4224).

The spelling of 3543681 in words is "three million, five hundred forty-three thousand, six hundred eighty-one".