3601665 has 20 divisors (see below), whose sum is σ = 6457044. Its totient is φ = 1920672.

The previous prime is 3601627. The next prime is 3601669. The reversal of 3601665 is 5661063.

3601665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 859329 + 2742336 = 927^2 + 1656^2 .

It is not a de Polignac number, because 3601665 - 2¹² = 3597569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3601669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4042 + ... + 4851.

Almost surely, 2^3601665 is an apocalyptic number.

It is an amenable number.

3601665 is a deficient number, since it is larger than the sum of its proper divisors (2855379).

3601665 is an equidigital number, since it uses as much as digits as its factorization.

3601665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910 (or 8901 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 3601665 is about 1897.8053114058. The cubic root of 3601665 is about 153.2855107112.

It can be divided in two parts, 360 and 1665, that added together give a square (2025 = 45²).

The spelling of 3601665 in words is "three million, six hundred one thousand, six hundred sixty-five".