12472561 has 4 divisors (see below), whose sum is σ = 12643492. Its totient is φ = 12301632.

The previous prime is 12472547. The next prime is 12472567. The reversal of 12472561 is 16527421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16527421 = 191 ⋅86531.

It can be written as a sum of positive squares in 2 ways, for example, as 9960336 + 2512225 = 3156^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12472561 - 2⁷ = 12472433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12472567) 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, 85356 + ... + 85501.

It is an arithmetic number, because the mean of its divisors is an integer number (3160873).

Almost surely, 2^12472561 is an apocalyptic number.

It is an amenable number.

12472561 is a deficient number, since it is larger than the sum of its proper divisors (170931).

12472561 is an equidigital number, since it uses as much as digits as its factorization.

12472561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170930.

The product of its digits is 3360, while the sum is 28.

The square root of 12472561 is about 3531.6513134793. The cubic root of 12472561 is about 231.9095032001.

Adding to 12472561 its reverse (16527421), we get a palindrome (28999982).

The spelling of 12472561 in words is "twelve million, four hundred seventy-two thousand, five hundred sixty-one".