12143541 has 4 divisors (see below), whose sum is σ = 16191392. Its totient is φ = 8095692.

The previous prime is 12143513. The next prime is 12143561. The reversal of 12143541 is 14534121.

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.

It is not a de Polignac number, because 12143541 - 2¹⁰ = 12142517 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 (12143561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2023921 + ... + 2023926.

It is an arithmetic number, because the mean of its divisors is an integer number (4047848).

Almost surely, 2^12143541 is an apocalyptic number.

It is an amenable number.

12143541 is a deficient number, since it is larger than the sum of its proper divisors (4047851).

12143541 is an equidigital number, since it uses as much as digits as its factorization.

12143541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047850.

The product of its digits is 480, while the sum is 21.

The square root of 12143541 is about 3484.7583847377. The cubic root of 12143541 is about 229.8520851094.

Adding to 12143541 its reverse (14534121), we get a palindrome (26677662).

The spelling of 12143541 in words is "twelve million, one hundred forty-three thousand, five hundred forty-one".