3261391 has 12 divisors (see below), whose sum is σ = 3837240. Its totient is φ = 2763600.

The previous prime is 3261373. The next prime is 3261397. The reversal of 3261391 is 1931623.

It is not a de Polignac number, because 3261391 - 2⁹ = 3260879 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4620 + ... + 5278.

It is an arithmetic number, because the mean of its divisors is an integer number (319770).

Almost surely, 2^3261391 is an apocalyptic number.

3261391 is a deficient number, since it is larger than the sum of its proper divisors (575849).

3261391 is a wasteful number, since it uses less digits than its factorization.

3261391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 767 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

The square root of 3261391 is about 1805.9321692688. The cubic root of 3261391 is about 148.2976569785.

The spelling of 3261391 in words is "three million, two hundred sixty-one thousand, three hundred ninety-one".