12147144 has 16 divisors (see below), whose sum is σ = 30367920. Its totient is φ = 4049040.

The previous prime is 12147139. The next prime is 12147173. The reversal of 12147144 is 44174121.

12147144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 506131 = 12147144 / (1 + 2 + 1 + 4 + 7 + 1 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253042 + ... + 253089.

It is an arithmetic number, because the mean of its divisors is an integer number (1897995).

Almost surely, 2^12147144 is an apocalyptic number.

It is an amenable number.

12147144 is an abundant number, since it is smaller than the sum of its proper divisors (18220776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12147144 is a wasteful number, since it uses less digits than its factorization.

12147144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506140 (or 506136 counting only the distinct ones).

The product of its digits is 896, while the sum is 24.

The square root of 12147144 is about 3485.2753119374. The cubic root of 12147144 is about 229.8748153045.

The spelling of 12147144 in words is "twelve million, one hundred forty-seven thousand, one hundred forty-four".