12611147 has 4 divisors (see below), whose sum is σ = 12688680. Its totient is φ = 12533616.

The previous prime is 12611111. The next prime is 12611167. The reversal of 12611147 is 74111621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74111621 = 47 ⋅1576843.

It is a cyclic number.

It is not a de Polignac number, because 12611147 - 2⁸ = 12610891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12611167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38522 + ... + 38847.

It is an arithmetic number, because the mean of its divisors is an integer number (3172170).

Almost surely, 2^12611147 is an apocalyptic number.

12611147 is a deficient number, since it is larger than the sum of its proper divisors (77533).

12611147 is an equidigital number, since it uses as much as digits as its factorization.

12611147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77532.

The product of its digits is 336, while the sum is 23.

The square root of 12611147 is about 3551.2176784872. The cubic root of 12611147 is about 232.7652778149.

Adding to 12611147 its reverse (74111621), we get a palindrome (86722768).

The spelling of 12611147 in words is "twelve million, six hundred eleven thousand, one hundred forty-seven".