12561473 has 4 divisors (see below), whose sum is σ = 13107648. Its totient is φ = 12015300.

The previous prime is 12561431. The next prime is 12561481. The reversal of 12561473 is 37416521.

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: 37416521 = 593 ⋅63097.

It is a cyclic number.

It is not a de Polignac number, because 12561473 - 2⁸ = 12561217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12561973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273053 + ... + 273098.

It is an arithmetic number, because the mean of its divisors is an integer number (3276912).

Almost surely, 2^12561473 is an apocalyptic number.

It is an amenable number.

12561473 is a deficient number, since it is larger than the sum of its proper divisors (546175).

12561473 is an equidigital number, since it uses as much as digits as its factorization.

12561473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546174.

The product of its digits is 5040, while the sum is 29.

The square root of 12561473 is about 3544.2168387388. The cubic root of 12561473 is about 232.4592629132.

Adding to 12561473 its reverse (37416521), we get a palindrome (49977994).

The spelling of 12561473 in words is "twelve million, five hundred sixty-one thousand, four hundred seventy-three".