3105881 has 4 divisors (see below), whose sum is σ = 3112164. Its totient is φ = 3099600.

The previous prime is 3105877. The next prime is 3105887. The reversal of 3105881 is 1885013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 1713481 = 1180^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 3105881 - 2² = 3105877 is a prime.

It is a super-2 number, since 2×3105881² = 19292993572322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3105881.

It is not an unprimeable number, because it can be changed into a prime (3105887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (778041).

Almost surely, 2^3105881 is an apocalyptic number.

It is an amenable number.

3105881 is a deficient number, since it is larger than the sum of its proper divisors (6283).

3105881 is an equidigital number, since it uses as much as digits as its factorization.

3105881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 3105881 is about 1762.3509866085. The cubic root of 3105881 is about 145.9021205468.

The spelling of 3105881 in words is "three million, one hundred five thousand, eight hundred eighty-one".