3681651 has 8 divisors (see below), whose sum is σ = 5013504. Its totient is φ = 2402120.

The previous prime is 3681619. The next prime is 3681683. The reversal of 3681651 is 1561863.

It is an interprime number because it is at equal distance from previous prime (3681619) and next prime (3681683).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3681651 - 2⁵ = 3681619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3681151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12915 + ... + 13196.

It is an arithmetic number, because the mean of its divisors is an integer number (626688).

Almost surely, 2^3681651 is an apocalyptic number.

3681651 is a deficient number, since it is larger than the sum of its proper divisors (1331853).

3681651 is a wasteful number, since it uses less digits than its factorization.

3681651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26161.

The product of its digits is 4320, while the sum is 30.

The square root of 3681651 is about 1918.7628826929. The cubic root of 3681651 is about 154.4119375407.

The spelling of 3681651 in words is "three million, six hundred eighty-one thousand, six hundred fifty-one".