12305137 has 4 divisors (see below), whose sum is σ = 13251700. Its totient is φ = 11358576.

The previous prime is 12305113. The next prime is 12305149. The reversal of 12305137 is 73150321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 8755681 = 1884^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 12305137 - 2¹⁹ = 11780849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12305177) 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, 473262 + ... + 473287.

It is an arithmetic number, because the mean of its divisors is an integer number (3312925).

Almost surely, 2^12305137 is an apocalyptic number.

It is an amenable number.

12305137 is a deficient number, since it is larger than the sum of its proper divisors (946563).

12305137 is an equidigital number, since it uses as much as digits as its factorization.

12305137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946562.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 12305137 is about 3507.8678709438. The cubic root of 12305137 is about 230.8671549910.

Adding to 12305137 its reverse (73150321), we get a palindrome (85455458).

The spelling of 12305137 in words is "twelve million, three hundred five thousand, one hundred thirty-seven".