3555561 has 16 divisors (see below), whose sum is σ = 4915008. Its totient is φ = 2284800.

The previous prime is 3555557. The next prime is 3555571. The reversal of 3555561 is 1655553.

It is not a de Polignac number, because 3555561 - 2² = 3555557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3555521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16746 + ... + 16956.

It is an arithmetic number, because the mean of its divisors is an integer number (307188).

Almost surely, 2^3555561 is an apocalyptic number.

It is an amenable number.

3555561 is a deficient number, since it is larger than the sum of its proper divisors (1359447).

3555561 is a wasteful number, since it uses less digits than its factorization.

3555561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its digits is 11250, while the sum is 30.

The square root of 3555561 is about 1885.6195268399. The cubic root of 3555561 is about 152.6286435779.

The spelling of 3555561 in words is "three million, five hundred fifty-five thousand, five hundred sixty-one".