12341561 has 4 divisors (see below), whose sum is σ = 12550800. Its totient is φ = 12132324.

The previous prime is 12341551. The next prime is 12341569. The reversal of 12341561 is 16514321.

12341561 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16514321 = 37 ⋅446333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12341561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12341569) 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, 104531 + ... + 104648.

It is an arithmetic number, because the mean of its divisors is an integer number (3137700).

Almost surely, 2^12341561 is an apocalyptic number.

It is an amenable number.

12341561 is a deficient number, since it is larger than the sum of its proper divisors (209239).

12341561 is an equidigital number, since it uses as much as digits as its factorization.

12341561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209238.

The product of its digits is 720, while the sum is 23.

The square root of 12341561 is about 3513.0557923267. The cubic root of 12341561 is about 231.0947244932.

Adding to 12341561 its reverse (16514321), we get a palindrome (28855882).

It can be divided in two parts, 123 and 41561, that multiplied together give a triangular number (5112003 = T₃₁₉₇).

The spelling of 12341561 in words is "twelve million, three hundred forty-one thousand, five hundred sixty-one".