12566834 has 20 divisors (see below), whose sum is σ = 21999054. Its totient is φ = 5383728.

The previous prime is 12566821. The next prime is 12566837. The reversal of 12566834 is 43866521.

It can be written as a sum of positive squares in only one way, i.e., 7263025 + 5303809 = 2695^2 + 2303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12566794 and 12566803.

It is not an unprimeable number, because it can be changed into a prime (12566837) 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 9 ways as a sum of consecutive naturals, for example, 3494 + ... + 6110.

Almost surely, 2^12566834 is an apocalyptic number.

12566834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12566834 is a deficient number, since it is larger than the sum of its proper divisors (9432220).

12566834 is an frugal number, since it uses more digits than its factorization.

12566834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2626 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 12566834 is about 3544.9730605464. The cubic root of 12566834 is about 232.4923279543.

The spelling of 12566834 in words is "twelve million, five hundred sixty-six thousand, eight hundred thirty-four".