12785019 has 24 divisors (see below), whose sum is σ = 18692352. Its totient is φ = 7768800.

The previous prime is 12785011. The next prime is 12785021. The reversal of 12785019 is 91058721.

It is not a de Polignac number, because 12785019 - 2³ = 12785011 is a prime.

It is a super-2 number, since 2×12785019² = 326913421660722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12785011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76474 + ... + 76640.

It is an arithmetic number, because the mean of its divisors is an integer number (778848).

Almost surely, 2^12785019 is an apocalyptic number.

12785019 is a deficient number, since it is larger than the sum of its proper divisors (5907333).

12785019 is a wasteful number, since it uses less digits than its factorization.

12785019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 12785019 is about 3575.6144926432. The cubic root of 12785019 is about 233.8301236187.

The spelling of 12785019 in words is "twelve million, seven hundred eighty-five thousand, nineteen".