12785445 has 48 divisors (see below), whose sum is σ = 24373440. Its totient is φ = 6407424.

The previous prime is 12785419. The next prime is 12785449. The reversal of 12785445 is 54458721.

It is not a de Polignac number, because 12785445 - 2⁵ = 12785413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785449) 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 47 ways as a sum of consecutive naturals, for example, 20346 + ... + 20964.

It is an arithmetic number, because the mean of its divisors is an integer number (507780).

Almost surely, 2^12785445 is an apocalyptic number.

12785445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12785445 is a deficient number, since it is larger than the sum of its proper divisors (11587995).

12785445 is an equidigital number, since it uses as much as digits as its factorization.

12785445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 644 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 12785445 is about 3575.6740623273. The cubic root of 12785445 is about 233.8327206824.

The spelling of 12785445 in words is "twelve million, seven hundred eighty-five thousand, four hundred forty-five".