3611641 has 4 divisors (see below), whose sum is σ = 3939984. Its totient is φ = 3283300.

The previous prime is 3611623. The next prime is 3611669. The reversal of 3611641 is 1461163.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1461163 = 11 ⋅132833.

It is a cyclic number.

It is not a de Polignac number, because 3611641 - 2⁷ = 3611513 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3611941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164155 + ... + 164176.

It is an arithmetic number, because the mean of its divisors is an integer number (984996).

Almost surely, 2^3611641 is an apocalyptic number.

It is an amenable number.

3611641 is a deficient number, since it is larger than the sum of its proper divisors (328343).

3611641 is a wasteful number, since it uses less digits than its factorization.

3611641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328342.

The product of its digits is 432, while the sum is 22.

The square root of 3611641 is about 1900.4317930407. The cubic root of 3611641 is about 153.4269051839.

It can be divided in two parts, 361 and 1641, that added together give a palindrome (2002).

The spelling of 3611641 in words is "three million, six hundred eleven thousand, six hundred forty-one".