3555643 has 16 divisors (see below), whose sum is σ = 4487616. Its totient is φ = 2741760.

The previous prime is 3555613. The next prime is 3555647. The reversal of 3555643 is 3465553.

3555643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3555643 - 2⁹ = 3555131 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555647) 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 15 ways as a sum of consecutive naturals, for example, 3255 + ... + 4207.

It is an arithmetic number, because the mean of its divisors is an integer number (280476).

Almost surely, 2^3555643 is an apocalyptic number.

3555643 is a deficient number, since it is larger than the sum of its proper divisors (931973).

3555643 is a wasteful number, since it uses less digits than its factorization.

3555643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its digits is 27000, while the sum is 31.

The square root of 3555643 is about 1885.6412702314. The cubic root of 3555643 is about 152.6298168998.

The spelling of 3555643 in words is "three million, five hundred fifty-five thousand, six hundred forty-three".