12645523 has 4 divisors (see below), whose sum is σ = 13795128. Its totient is φ = 11495920.

The previous prime is 12645509. The next prime is 12645533. The reversal of 12645523 is 32554621.

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 12645523 - 2⁹ = 12645011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12645491 and 12645500.

It is not an unprimeable number, because it can be changed into a prime (12645533) 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, 574786 + ... + 574807.

It is an arithmetic number, because the mean of its divisors is an integer number (3448782).

Almost surely, 2^12645523 is an apocalyptic number.

12645523 is a deficient number, since it is larger than the sum of its proper divisors (1149605).

12645523 is a wasteful number, since it uses less digits than its factorization.

12645523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149604.

The product of its digits is 7200, while the sum is 28.

The square root of 12645523 is about 3556.0544146568. The cubic root of 12645523 is about 232.9765797651.

The spelling of 12645523 in words is "twelve million, six hundred forty-five thousand, five hundred twenty-three".