12310561 has 4 divisors (see below), whose sum is σ = 12437572. Its totient is φ = 12183552.

The previous prime is 12310549. The next prime is 12310591. The reversal of 12310561 is 16501321.

12310561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16501321 = 103 ⋅160207.

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 3400336 = 2985^2 + 1844^2 .

It is a cyclic number.

It is not a de Polignac number, because 12310561 - 2¹³ = 12302369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12310511) 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, 63360 + ... + 63553.

It is an arithmetic number, because the mean of its divisors is an integer number (3109393).

Almost surely, 2^12310561 is an apocalyptic number.

It is an amenable number.

12310561 is a deficient number, since it is larger than the sum of its proper divisors (127011).

12310561 is an equidigital number, since it uses as much as digits as its factorization.

12310561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127010.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12310561 is about 3508.6409049659. The cubic root of 12310561 is about 230.9010714359.

Adding to 12310561 its reverse (16501321), we get a palindrome (28811882).

The spelling of 12310561 in words is "twelve million, three hundred ten thousand, five hundred sixty-one".