12143523 has 12 divisors (see below), whose sum is σ = 18835080. Its totient is φ = 6939072.

The previous prime is 12143513. The next prime is 12143561. The reversal of 12143523 is 32534121.

It is not a de Polignac number, because 12143523 - 2⁶ = 12143459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12143523.

It is not an unprimeable number, because it can be changed into a prime (12143513) 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 11 ways as a sum of consecutive naturals, for example, 41158 + ... + 41451.

It is an arithmetic number, because the mean of its divisors is an integer number (1569590).

Almost surely, 2^12143523 is an apocalyptic number.

12143523 is a deficient number, since it is larger than the sum of its proper divisors (6691557).

12143523 is an equidigital number, since it uses as much as digits as its factorization.

12143523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82626 (or 82619 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 12143523 is about 3484.7558020613. The cubic root of 12143523 is about 229.8519715417.

Adding to 12143523 its reverse (32534121), we get a palindrome (44677644).

The spelling of 12143523 in words is "twelve million, one hundred forty-three thousand, five hundred twenty-three".