12143653 has 4 divisors (see below), whose sum is σ = 12150880. Its totient is φ = 12136428.

The previous prime is 12143639. The next prime is 12143687. The reversal of 12143653 is 35634121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35634121 = 977 ⋅36473.

It is a cyclic number.

It is not a de Polignac number, because 12143653 - 2²¹ = 10046501 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 (12143633) 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, 376 + ... + 4942.

It is an arithmetic number, because the mean of its divisors is an integer number (3037720).

Almost surely, 2^12143653 is an apocalyptic number.

It is an amenable number.

12143653 is a deficient number, since it is larger than the sum of its proper divisors (7227).

12143653 is an equidigital number, since it uses as much as digits as its factorization.

12143653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226.

The product of its digits is 2160, while the sum is 25.

The square root of 12143653 is about 3484.7744546814. The cubic root of 12143653 is about 229.8527917499.

Adding to 12143653 its reverse (35634121), we get a palindrome (47777774).

The spelling of 12143653 in words is "twelve million, one hundred forty-three thousand, six hundred fifty-three".