3655642 has 16 divisors (see below), whose sum is σ = 5682600. Its totient is φ = 1762560.

The previous prime is 3655633. The next prime is 3655649. The reversal of 3655642 is 2465563.

It can be written as a sum of positive squares in 4 ways, for example, as 3272481 + 383161 = 1809^2 + 619^2 .

It is not an unprimeable number, because it can be changed into a prime (3655649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8734 + ... + 9142.

Almost surely, 2^3655642 is an apocalyptic number.

3655642 is a deficient number, since it is larger than the sum of its proper divisors (2026958).

3655642 is a wasteful number, since it uses less digits than its factorization.

3655642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its digits is 21600, while the sum is 31.

The square root of 3655642 is about 1911.9733261738. The cubic root of 3655642 is about 154.0474638653.

The spelling of 3655642 in words is "three million, six hundred fifty-five thousand, six hundred forty-two".