3561013 has 4 divisors (see below), whose sum is σ = 3609868. Its totient is φ = 3512160.

The previous prime is 3560993. The next prime is 3561023. The reversal of 3561013 is 3101653.

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

It can be written as a sum of positive squares in 2 ways, for example, as 877969 + 2683044 = 937^2 + 1638^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561013 - 2⁵ = 3560981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561023) 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, 24318 + ... + 24463.

It is an arithmetic number, because the mean of its divisors is an integer number (902467).

Almost surely, 2^3561013 is an apocalyptic number.

It is an amenable number.

3561013 is a deficient number, since it is larger than the sum of its proper divisors (48855).

3561013 is an equidigital number, since it uses as much as digits as its factorization.

3561013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48854.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 3561013 is about 1887.0646517806. The cubic root of 3561013 is about 152.7066159339.

Adding to 3561013 its reverse (3101653), we get a palindrome (6662666).

It can be divided in two parts, 356 and 1013, that added together give a square (1369 = 37²).

The spelling of 3561013 in words is "three million, five hundred sixty-one thousand, thirteen".