3561945 has 16 divisors (see below), whose sum is σ = 5769792. Its totient is φ = 1876160.

The previous prime is 3561913. The next prime is 3561947. The reversal of 3561945 is 5491653.

It is a happy number.

It is not a de Polignac number, because 3561945 - 2⁵ = 3561913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3561947) 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 15 ways as a sum of consecutive naturals, for example, 186 + ... + 2675.

It is an arithmetic number, because the mean of its divisors is an integer number (360612).

Almost surely, 2^3561945 is an apocalyptic number.

It is an amenable number.

3561945 is a deficient number, since it is larger than the sum of its proper divisors (2207847).

3561945 is a wasteful number, since it uses less digits than its factorization.

3561945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952.

The product of its digits is 16200, while the sum is 33.

The square root of 3561945 is about 1887.3115799994. The cubic root of 3561945 is about 152.7199370639.

The spelling of 3561945 in words is "three million, five hundred sixty-one thousand, nine hundred forty-five".