12146539 has 4 divisors (see below), whose sum is σ = 12405024. Its totient is φ = 11888056.

The previous prime is 12146527. The next prime is 12146549. The reversal of 12146539 is 93564121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12146539 - 2¹¹ = 12144491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12146539.

It is not an unprimeable number, because it can be changed into a prime (12146549) 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, 129172 + ... + 129265.

It is an arithmetic number, because the mean of its divisors is an integer number (3101256).

Almost surely, 2^12146539 is an apocalyptic number.

12146539 is a deficient number, since it is larger than the sum of its proper divisors (258485).

12146539 is an equidigital number, since it uses as much as digits as its factorization.

12146539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258484.

The product of its digits is 6480, while the sum is 31.

The square root of 12146539 is about 3485.1885171394. The cubic root of 12146539 is about 229.8709988636.

The spelling of 12146539 in words is "twelve million, one hundred forty-six thousand, five hundred thirty-nine".