3655557 has 8 divisors (see below), whose sum is σ = 5415680. Its totient is φ = 2437020.

The previous prime is 3655541. The next prime is 3655579. The reversal of 3655557 is 7555563.

It is not a de Polignac number, because 3655557 - 2⁴ = 3655541 is a prime.

It is a Duffinian number.

3655557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655957) 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 in 7 ways as a sum of consecutive naturals, for example, 67669 + ... + 67722.

It is an arithmetic number, because the mean of its divisors is an integer number (676960).

Almost surely, 2^3655557 is an apocalyptic number.

It is an amenable number.

3655557 is a deficient number, since it is larger than the sum of its proper divisors (1760123).

3655557 is a wasteful number, since it uses less digits than its factorization.

3655557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135400 (or 135394 counting only the distinct ones).

The product of its digits is 78750, while the sum is 36.

The square root of 3655557 is about 1911.9510977010. The cubic root of 3655557 is about 154.0462698994.

The spelling of 3655557 in words is "three million, six hundred fifty-five thousand, five hundred fifty-seven".