3555881 has 10 divisors (see below), whose sum is σ = 4151082. Its totient is φ = 3045840.

The previous prime is 3555859. The next prime is 3555883. The reversal of 3555881 is 1885553.

It can be written as a sum of positive squares in only one way, i.e., 2941225 + 614656 = 1715^2 + 784^2 .

It is not a de Polignac number, because 3555881 - 2¹⁸ = 3293737 is a prime.

It is a super-2 number, since 2×3555881² = 25288579372322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3555883) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1661 + ... + 3141.

Almost surely, 2^3555881 is an apocalyptic number.

It is an amenable number.

3555881 is a deficient number, since it is larger than the sum of its proper divisors (595201).

3555881 is an frugal number, since it uses more digits than its factorization.

3555881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1488 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

The square root of 3555881 is about 1885.7043776796. The cubic root of 3555881 is about 152.6332222928.

The spelling of 3555881 in words is "three million, five hundred fifty-five thousand, eight hundred eighty-one".