3551945 has 4 divisors (see below), whose sum is σ = 4262340. Its totient is φ = 2841552.

The previous prime is 3551941. The next prime is 3551957. The reversal of 3551945 is 5491553.

3551945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1923769 + 1628176 = 1387^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 3551945 - 2² = 3551941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3551941) 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 3 ways as a sum of consecutive naturals, for example, 355190 + ... + 355199.

It is an arithmetic number, because the mean of its divisors is an integer number (1065585).

Almost surely, 2^3551945 is an apocalyptic number.

It is an amenable number.

3551945 is a deficient number, since it is larger than the sum of its proper divisors (710395).

3551945 is an equidigital number, since it uses as much as digits as its factorization.

3551945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710394.

The product of its digits is 13500, while the sum is 32.

The square root of 3551945 is about 1884.6604468710. The cubic root of 3551945 is about 152.5768849969.

The spelling of 3551945 in words is "three million, five hundred fifty-one thousand, nine hundred forty-five".