12722147 has 4 divisors (see below), whose sum is σ = 12729480. Its totient is φ = 12714816.

The previous prime is 12722141. The next prime is 12722159. The reversal of 12722147 is 74122721.

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: 74122721 = 23 ⋅3222727.

It is a cyclic number.

It is not a de Polignac number, because 12722147 - 2⁴ = 12722131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12722141) 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, 563 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (3182370).

Almost surely, 2^12722147 is an apocalyptic number.

12722147 is a deficient number, since it is larger than the sum of its proper divisors (7333).

12722147 is an equidigital number, since it uses as much as digits as its factorization.

12722147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332.

The product of its digits is 1568, while the sum is 26.

The square root of 12722147 is about 3566.8118817790. The cubic root of 12722147 is about 233.4461968729.

Adding to 12722147 its reverse (74122721), we get a palindrome (86844868).

The spelling of 12722147 in words is "twelve million, seven hundred twenty-two thousand, one hundred forty-seven".