3261563 has 4 divisors (see below), whose sum is σ = 3266160. Its totient is φ = 3256968.

The previous prime is 3261553. The next prime is 3261581. The reversal of 3261563 is 3651623.

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

It is a cyclic number.

It is not a de Polignac number, because 3261563 - 2⁴ = 3261547 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (3261523) 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, 983 + ... + 2736.

It is an arithmetic number, because the mean of its divisors is an integer number (816540).

Almost surely, 2^3261563 is an apocalyptic number.

3261563 is a deficient number, since it is larger than the sum of its proper divisors (4597).

3261563 is an equidigital number, since it uses as much as digits as its factorization.

3261563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596.

The product of its digits is 3240, while the sum is 26.

The square root of 3261563 is about 1805.9797894772. The cubic root of 3261563 is about 148.3002639182.

The spelling of 3261563 in words is "three million, two hundred sixty-one thousand, five hundred sixty-three".