12143539 has 6 divisors (see below), whose sum is σ = 12243980. Its totient is φ = 12043836.

The previous prime is 12143513. The next prime is 12143561. The reversal of 12143539 is 93534121.

It is a de Polignac number, because none of the positive numbers 2^k-12143539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12143639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31852 + ... + 32230.

Almost surely, 2^12143539 is an apocalyptic number.

12143539 is a deficient number, since it is larger than the sum of its proper divisors (100441).

12143539 is an frugal number, since it uses more digits than its factorization.

12143539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 558 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 12143539 is about 3484.7580977738. The cubic root of 12143539 is about 229.8520724907.

It can be divided in two parts, 1214 and 3539, that added together give a triangular number (4753 = T₉₇).

The spelling of 12143539 in words is "twelve million, one hundred forty-three thousand, five hundred thirty-nine".