3615641 has 2 divisors, whose sum is σ = 3615642. Its totient is φ = 3615640.

The previous prime is 3615587. The next prime is 3615649. The reversal of 3615641 is 1465163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3345241 + 270400 = 1829^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3615641 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3615641.

It is not a weakly prime, because it can be changed into another prime (3615649) 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 as a sum of consecutive naturals, namely, 1807820 + 1807821.

It is an arithmetic number, because the mean of its divisors is an integer number (1807821).

Almost surely, 2^3615641 is an apocalyptic number.

It is an amenable number.

3615641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3615641 is an equidigital number, since it uses as much as digits as its factorization.

3615641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 3615641 is about 1901.4838942258. The cubic root of 3615641 is about 153.4835259087.

The spelling of 3615641 in words is "three million, six hundred fifteen thousand, six hundred forty-one".