12612143 has 4 divisors (see below), whose sum is σ = 13275960. Its totient is φ = 11948328.

The previous prime is 12612139. The next prime is 12612169. The reversal of 12612143 is 34121621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12612143 - 2² = 12612139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12612343) 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, 331880 + ... + 331917.

It is an arithmetic number, because the mean of its divisors is an integer number (3318990).

Almost surely, 2^12612143 is an apocalyptic number.

12612143 is a deficient number, since it is larger than the sum of its proper divisors (663817).

12612143 is an equidigital number, since it uses as much as digits as its factorization.

12612143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663816.

The product of its digits is 288, while the sum is 20.

The square root of 12612143 is about 3551.3579093074. The cubic root of 12612143 is about 232.7714054128.

Adding to 12612143 its reverse (34121621), we get a palindrome (46733764).

The spelling of 12612143 in words is "twelve million, six hundred twelve thousand, one hundred forty-three".