12425561 has 4 divisors (see below), whose sum is σ = 12432612. Its totient is φ = 12418512.

The previous prime is 12425551. The next prime is 12425573. The reversal of 12425561 is 16552421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16552421 = 2441 ⋅6781.

It can be written as a sum of positive squares in 2 ways, for example, as 11182336 + 1243225 = 3344^2 + 1115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12425561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 12425561.

It is not an unprimeable number, because it can be changed into a prime (12425551) 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, 1751 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (3108153).

Almost surely, 2^12425561 is an apocalyptic number.

It is an amenable number.

12425561 is a deficient number, since it is larger than the sum of its proper divisors (7051).

12425561 is an equidigital number, since it uses as much as digits as its factorization.

12425561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7050.

The product of its digits is 2400, while the sum is 26.

The square root of 12425561 is about 3524.9909219741. The cubic root of 12425561 is about 231.6178371861.

Adding to 12425561 its reverse (16552421), we get a palindrome (28977982).

The spelling of 12425561 in words is "twelve million, four hundred twenty-five thousand, five hundred sixty-one".