3561845 has 16 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 2422464.

The previous prime is 3561841. The next prime is 3561847. The reversal of 3561845 is 5481653.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3561845 - 2² = 3561841 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561841) 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, 4874 + ... + 5556.

It is an arithmetic number, because the mean of its divisors is an integer number (307800).

Almost surely, 2^3561845 is an apocalyptic number.

3561845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3561845 is a deficient number, since it is larger than the sum of its proper divisors (1362955).

3561845 is a wasteful number, since it uses less digits than its factorization.

3561845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its digits is 14400, while the sum is 32.

The square root of 3561845 is about 1887.2850871026. The cubic root of 3561845 is about 152.7185078694.

The spelling of 3561845 in words is "three million, five hundred sixty-one thousand, eight hundred forty-five".