12147243 has 8 divisors (see below), whose sum is σ = 16900608. Its totient is φ = 7746024.

The previous prime is 12147221. The next prime is 12147263. The reversal of 12147243 is 34274121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12147243 - 2⁹ = 12146731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12147203) 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 7 ways as a sum of consecutive naturals, for example, 87955 + ... + 88092.

It is an arithmetic number, because the mean of its divisors is an integer number (2112576).

Almost surely, 2^12147243 is an apocalyptic number.

12147243 is a deficient number, since it is larger than the sum of its proper divisors (4753365).

12147243 is a wasteful number, since it uses less digits than its factorization.

12147243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176073.

The product of its digits is 1344, while the sum is 24.

The square root of 12147243 is about 3485.2895145167. The cubic root of 12147243 is about 229.8754398010.

The spelling of 12147243 in words is "twelve million, one hundred forty-seven thousand, two hundred forty-three".