3722681 has 4 divisors (see below), whose sum is σ = 3823332. Its totient is φ = 3622032.

The previous prime is 3722629. The next prime is 3722683. The reversal of 3722681 is 1862273.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2941225 + 781456 = 1715^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 3722681 - 2⁶ = 3722617 is a prime.

It is a super-2 number, since 2×3722681² = 27716707655522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3722683) 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 3 ways as a sum of consecutive naturals, for example, 50270 + ... + 50343.

It is an arithmetic number, because the mean of its divisors is an integer number (955833).

Almost surely, 2^3722681 is an apocalyptic number.

It is an amenable number.

3722681 is a deficient number, since it is larger than the sum of its proper divisors (100651).

3722681 is a wasteful number, since it uses less digits than its factorization.

3722681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100650.

The product of its digits is 4032, while the sum is 29.

The square root of 3722681 is about 1929.4250438926. The cubic root of 3722681 is about 154.9834321521.

The spelling of 3722681 in words is "three million, seven hundred twenty-two thousand, six hundred eighty-one".