3556861 has 12 divisors (see below), whose sum is σ = 4514400. Its totient is φ = 2771160.

The previous prime is 3556853. The next prime is 3556877. The reversal of 3556861 is 1686553.

It is not a de Polignac number, because 3556861 - 2³ = 3556853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3556801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2761 + ... + 3838.

It is an arithmetic number, because the mean of its divisors is an integer number (376200).

Almost surely, 2^3556861 is an apocalyptic number.

It is an amenable number.

3556861 is a deficient number, since it is larger than the sum of its proper divisors (957539).

3556861 is a wasteful number, since it uses less digits than its factorization.

3556861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624 (or 6617 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 3556861 is about 1885.9642096286. The cubic root of 3556861 is about 152.6472428987.

The spelling of 3556861 in words is "three million, five hundred fifty-six thousand, eight hundred sixty-one".