12406785 has 16 divisors (see below), whose sum is σ = 20057856. Its totient is φ = 6547968.

The previous prime is 12406781. The next prime is 12406799. The reversal of 12406785 is 58760421.

It is not a de Polignac number, because 12406785 - 2² = 12406781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12406781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2809 + ... + 5718.

It is an arithmetic number, because the mean of its divisors is an integer number (1253616).

It is a Proth number, since it is equal to 3029 ⋅ 2¹² + 1 and 3029 < 2¹².

Almost surely, 2^12406785 is an apocalyptic number.

12406785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12406785 is a deficient number, since it is larger than the sum of its proper divisors (7651071).

12406785 is an equidigital number, since it uses as much as digits as its factorization.

12406785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12406785 is about 3522.3266458408. The cubic root of 12406785 is about 231.5011141172.

The spelling of 12406785 in words is "twelve million, four hundred six thousand, seven hundred eighty-five".