3549645 has 48 divisors (see below), whose sum is σ = 6873984. Its totient is φ = 1680000.

The previous prime is 3549641. The next prime is 3549647. The reversal of 3549645 is 5469453.

It is a happy number.

3549645 is a `hidden beast` number, since 3 + 5 + 4 + 9 + 645 = 666.

It is not a de Polignac number, because 3549645 - 2² = 3549641 is a prime.

It is a super-3 number, since 3×3549645³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3549641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35095 + ... + 35195.

It is an arithmetic number, because the mean of its divisors is an integer number (143208).

Almost surely, 2^3549645 is an apocalyptic number.

It is an amenable number.

3549645 is a deficient number, since it is larger than the sum of its proper divisors (3324339).

3549645 is a wasteful number, since it uses less digits than its factorization.

3549645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 191 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 3549645 is about 1884.0501585680. The cubic root of 3549645 is about 152.5439450528.

It can be divided in two parts, 354 and 9645, that added together give a palindrome (9999).

The spelling of 3549645 in words is "three million, five hundred forty-nine thousand, six hundred forty-five".