12139563 has 4 divisors (see below), whose sum is σ = 16186088. Its totient is φ = 8093040.

The previous prime is 12139559. The next prime is 12139573. The reversal of 12139563 is 36593121.

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

It is not a de Polignac number, because 12139563 - 2² = 12139559 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 12139563.

It is not an unprimeable number, because it can be changed into a prime (12139573) 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 3 ways as a sum of consecutive naturals, for example, 2023258 + ... + 2023263.

It is an arithmetic number, because the mean of its divisors is an integer number (4046522).

Almost surely, 2^12139563 is an apocalyptic number.

12139563 is a deficient number, since it is larger than the sum of its proper divisors (4046525).

12139563 is an equidigital number, since it uses as much as digits as its factorization.

12139563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046524.

The product of its digits is 4860, while the sum is 30.

The square root of 12139563 is about 3484.1875667076. The cubic root of 12139563 is about 229.8269839340.

The spelling of 12139563 in words is "twelve million, one hundred thirty-nine thousand, five hundred sixty-three".