3561281 has 8 divisors (see below), whose sum is σ = 3646944. Its totient is φ = 3476800.

The previous prime is 3561263. The next prime is 3561293. The reversal of 3561281 is 1821653.

3561281 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 a cyclic number.

It is not a de Polignac number, because 3561281 - 2¹⁸ = 3299137 is a prime.

It is a super-2 number, since 2×3561281² = 25365444721922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3561281.

It is not an unprimeable number, because it can be changed into a prime (3561221) 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, 8681 + ... + 9081.

It is an arithmetic number, because the mean of its divisors is an integer number (455868).

Almost surely, 2^3561281 is an apocalyptic number.

It is an amenable number.

3561281 is a deficient number, since it is larger than the sum of its proper divisors (85663).

3561281 is a wasteful number, since it uses less digits than its factorization.

3561281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591.

The product of its digits is 1440, while the sum is 26.

The square root of 3561281 is about 1887.1356602004. The cubic root of 3561281 is about 152.7104467115.

It can be divided in two parts, 35 and 61281, that added together give a palindrome (61316).

The spelling of 3561281 in words is "three million, five hundred sixty-one thousand, two hundred eighty-one".