3555729 has 12 divisors (see below), whose sum is σ = 5190276. Its totient is φ = 2345472.

The previous prime is 3555701. The next prime is 3555743. The reversal of 3555729 is 9275553.

It can be written as a sum of positive squares in 2 ways, for example, as 921600 + 2634129 = 960^2 + 1623^2 .

It is not a de Polignac number, because 3555729 - 2⁵ = 3555697 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3555693 and 3555702.

It is not an unprimeable number, because it can be changed into a prime (3555749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1164 + ... + 2909.

It is an arithmetic number, because the mean of its divisors is an integer number (432523).

Almost surely, 2^3555729 is an apocalyptic number.

It is an amenable number.

3555729 is a deficient number, since it is larger than the sum of its proper divisors (1634547).

3555729 is a wasteful number, since it uses less digits than its factorization.

3555729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 4173 counting only the distinct ones).

The product of its digits is 47250, while the sum is 36.

The square root of 3555729 is about 1885.6640740068. The cubic root of 3555729 is about 152.6310474375.

It can be divided in two parts, 355 and 5729, that added together give a square (6084 = 78²).

The spelling of 3555729 in words is "three million, five hundred fifty-five thousand, seven hundred twenty-nine".