3701681 has 4 divisors (see below), whose sum is σ = 3723252. Its totient is φ = 3680112.

The previous prime is 3701653. The next prime is 3701701. The reversal of 3701681 is 1861073.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1861073 = 677 ⋅2749.

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 167281 = 1880^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 3701681 - 2¹⁸ = 3439537 is a prime.

It is a super-2 number, since 2×3701681² = 27404884451522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3701681.

It is not an unprimeable number, because it can be changed into a prime (3701641) 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, 10526 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (930813).

Almost surely, 2^3701681 is an apocalyptic number.

It is an amenable number.

3701681 is a deficient number, since it is larger than the sum of its proper divisors (21571).

3701681 is a wasteful number, since it uses less digits than its factorization.

3701681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21570.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 3701681 is about 1923.9753116919. The cubic root of 3701681 is about 154.6914569814.

The spelling of 3701681 in words is "three million, seven hundred one thousand, six hundred eighty-one".