12785456 has 10 divisors (see below), whose sum is σ = 24771852. Its totient is φ = 6392720.

The previous prime is 12785449. The next prime is 12785459. The reversal of 12785456 is 65458721.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12785459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399530 + ... + 399561.

Almost surely, 2^12785456 is an apocalyptic number.

12785456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12785456 is a deficient number, since it is larger than the sum of its proper divisors (11986396).

12785456 is an equidigital number, since it uses as much as digits as its factorization.

12785456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799099 (or 799093 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 12785456 is about 3575.6756004985. The cubic root of 12785456 is about 233.8327877420.

The spelling of 12785456 in words is "twelve million, seven hundred eighty-five thousand, four hundred fifty-six".