12520445 has 8 divisors (see below), whose sum is σ = 17170944. Its totient is φ = 8585424.

The previous prime is 12520421. The next prime is 12520447. The reversal of 12520445 is 54402521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12520445 - 2¹⁰ = 12519421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12520445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178829 + ... + 178898.

It is an arithmetic number, because the mean of its divisors is an integer number (2146368).

Almost surely, 2^12520445 is an apocalyptic number.

It is an amenable number.

12520445 is a deficient number, since it is larger than the sum of its proper divisors (4650499).

12520445 is an equidigital number, since it uses as much as digits as its factorization.

12520445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357739.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 12520445 is about 3538.4240842499. The cubic root of 12520445 is about 232.2059024709.

Adding to 12520445 its reverse (54402521), we get a palindrome (66922966).

The spelling of 12520445 in words is "twelve million, five hundred twenty thousand, four hundred forty-five".