12785417 has 4 divisors (see below), whose sum is σ = 12995076. Its totient is φ = 12575760.

The previous prime is 12785413. The next prime is 12785419. The reversal of 12785417 is 71458721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71458721 = 3529 ⋅20249.

It can be written as a sum of positive squares in 2 ways, for example, as 5900041 + 6885376 = 2429^2 + 2624^2 .

It is not a de Polignac number, because 12785417 - 2² = 12785413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12785413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104738 + ... + 104859.

It is an arithmetic number, because the mean of its divisors is an integer number (3248769).

Almost surely, 2^12785417 is an apocalyptic number.

It is an amenable number.

12785417 is a deficient number, since it is larger than the sum of its proper divisors (209659).

12785417 is an equidigital number, since it uses as much as digits as its factorization.

12785417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209658.

The product of its digits is 15680, while the sum is 35.

The square root of 12785417 is about 3575.6701469794. The cubic root of 12785417 is about 233.8325499852.

The spelling of 12785417 in words is "twelve million, seven hundred eighty-five thousand, four hundred seventeen".