3641 has 4 divisors (see below), whose sum is σ = 3984. Its totient is φ = 3300.

The previous prime is 3637. The next prime is 3643. The reversal of 3641 is 1463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3641 - 2² = 3637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (3643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 176.

It is an arithmetic number, because the mean of its divisors is an integer number (996).

It is an amenable number.

3641 is a deficient number, since it is larger than the sum of its proper divisors (343).

3641 is a wasteful number, since it uses less digits than its factorization.

3641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its digits is 72, while the sum is 14.

The square root of 3641 is about 60.3406993662. The cubic root of 3641 is about 15.3841519091.

Adding to 3641 its sum of digits (14), we get a triangular number (3655 = T₈₅).

It can be divided in two parts, 36 and 41, that added together give a palindrome (77).

The spelling of 3641 in words is "three thousand, six hundred forty-one".