3261881 has 6 divisors (see below), whose sum is σ = 3794490. Its totient is φ = 2795856.

The previous prime is 3261877. The next prime is 3261889. The reversal of 3261881 is 1881623.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 1301881 = 1400^2 + 1141^2 .

It is not a de Polignac number, because 3261881 - 2² = 3261877 is a prime.

It is a super-2 number, since 2×3261881² = 21279735316322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3261889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33236 + ... + 33333.

It is an arithmetic number, because the mean of its divisors is an integer number (632415).

Almost surely, 2^3261881 is an apocalyptic number.

It is an amenable number.

3261881 is a deficient number, since it is larger than the sum of its proper divisors (532609).

3261881 is an equidigital number, since it uses as much as digits as its factorization.

3261881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66583 (or 66576 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 3261881 is about 1806.0678281836. The cubic root of 3261881 is about 148.3050834838.

The spelling of 3261881 in words is "three million, two hundred sixty-one thousand, eight hundred eighty-one".