12485643 has 4 divisors (see below), whose sum is σ = 16647528. Its totient is φ = 8323760.

The previous prime is 12485617. The next prime is 12485647. The reversal of 12485643 is 34658421.

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 12485643 - 2⁸ = 12485387 is a prime.

It is a super-2 number, since 2×12485643² = 311782562246898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12485647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080938 + ... + 2080943.

It is an arithmetic number, because the mean of its divisors is an integer number (4161882).

Almost surely, 2^12485643 is an apocalyptic number.

12485643 is a deficient number, since it is larger than the sum of its proper divisors (4161885).

12485643 is an equidigital number, since it uses as much as digits as its factorization.

12485643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161884.

The product of its digits is 23040, while the sum is 33.

The square root of 12485643 is about 3533.5029361810. The cubic root of 12485643 is about 231.9905552536.

The spelling of 12485643 in words is "twelve million, four hundred eighty-five thousand, six hundred forty-three".