3655741 has 2 divisors, whose sum is σ = 3655742. Its totient is φ = 3655740.

The previous prime is 3655739. The next prime is 3655747. The reversal of 3655741 is 1475563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2390116 + 1265625 = 1546^2 + 1125^2 .

It is an emirp because it is prime and its reverse (1475563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3655741 - 2¹ = 3655739 is a prime.

Together with 3655739, it forms a pair of twin primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁸ + 6⁸ + 5 + 5⁹ + 7² + 4⁷ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3655747) 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, 1827870 + 1827871.

It is an arithmetic number, because the mean of its divisors is an integer number (1827871).

Almost surely, 2^3655741 is an apocalyptic number.

It is an amenable number.

3655741 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655741 is an equidigital number, since it uses as much as digits as its factorization.

3655741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 3655741 is about 1911.9992154810. Note that the first 3 decimals coincide. The cubic root of 3655741 is about 154.0488544611.

The spelling of 3655741 in words is "three million, six hundred fifty-five thousand, seven hundred forty-one".