12561417 has 24 divisors (see below), whose sum is σ = 20437248. Its totient is φ = 7365600.

The previous prime is 12561401. The next prime is 12561431. The reversal of 12561417 is 71416521.

It is a happy number.

It is not a de Polignac number, because 12561417 - 2⁴ = 12561401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12561217) 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 23 ways as a sum of consecutive naturals, for example, 1023 + ... + 5115.

It is an arithmetic number, because the mean of its divisors is an integer number (851552).

Almost surely, 2^12561417 is an apocalyptic number.

It is an amenable number.

12561417 is a deficient number, since it is larger than the sum of its proper divisors (7875831).

12561417 is a wasteful number, since it uses less digits than its factorization.

12561417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141 (or 4138 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 12561417 is about 3544.2089385362. The cubic root of 12561417 is about 232.4589174724.

Adding to 12561417 its reverse (71416521), we get a palindrome (83977938).

The spelling of 12561417 in words is "twelve million, five hundred sixty-one thousand, four hundred seventeen".