12194539 has 4 divisors (see below), whose sum is σ = 13936624. Its totient is φ = 10452456.

The previous prime is 12194537. The next prime is 12194543. The reversal of 12194539 is 93549121.

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

It is not a de Polignac number, because 12194539 - 2¹ = 12194537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12194537) 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, 871032 + ... + 871045.

It is an arithmetic number, because the mean of its divisors is an integer number (3484156).

Almost surely, 2^12194539 is an apocalyptic number.

12194539 is a deficient number, since it is larger than the sum of its proper divisors (1742085).

12194539 is an equidigital number, since it uses as much as digits as its factorization.

12194539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742084.

The product of its digits is 9720, while the sum is 34.

The square root of 12194539 is about 3492.0680119379. The cubic root of 12194539 is about 230.1733979122.

The spelling of 12194539 in words is "twelve million, one hundred ninety-four thousand, five hundred thirty-nine".