12266819 has 4 divisors (see below), whose sum is σ = 12414696. Its totient is φ = 12118944.

The previous prime is 12266791. The next prime is 12266827. The reversal of 12266819 is 91866221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12266819 - 2¹⁶ = 12201283 is a prime.

It is a super-4 number, since 4×12266819⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12266879) 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 3 ways as a sum of consecutive naturals, for example, 73814 + ... + 73979.

It is an arithmetic number, because the mean of its divisors is an integer number (3103674).

Almost surely, 2^12266819 is an apocalyptic number.

12266819 is a deficient number, since it is larger than the sum of its proper divisors (147877).

12266819 is an equidigital number, since it uses as much as digits as its factorization.

12266819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147876.

The product of its digits is 10368, while the sum is 35.

The square root of 12266819 is about 3502.4018901320. The cubic root of 12266819 is about 230.6272669386.

The spelling of 12266819 in words is "twelve million, two hundred sixty-six thousand, eight hundred nineteen".