3261561 has 8 divisors (see below), whose sum is σ = 4537920. Its totient is φ = 2079792.

The previous prime is 3261553. The next prime is 3261581. The reversal of 3261561 is 1651623.

3261561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3261561 - 2³ = 3261553 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23566 + ... + 23703.

It is an arithmetic number, because the mean of its divisors is an integer number (567240).

Almost surely, 2^3261561 is an apocalyptic number.

It is an amenable number.

3261561 is a deficient number, since it is larger than the sum of its proper divisors (1276359).

3261561 is a wasteful number, since it uses less digits than its factorization.

3261561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47295.

The product of its digits is 1080, while the sum is 24.

The square root of 3261561 is about 1805.9792357610. The cubic root of 3261561 is about 148.3002336054.

The spelling of 3261561 in words is "three million, two hundred sixty-one thousand, five hundred sixty-one".