12266781 has 8 divisors (see below), whose sum is σ = 16539840. Its totient is φ = 8085792.

The previous prime is 12266777. The next prime is 12266789. The reversal of 12266781 is 18766221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12266781 - 2² = 12266777 is a prime.

It is a super-2 number, since 2×12266781² = 300947832203922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12266789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22705 + ... + 23238.

It is an arithmetic number, because the mean of its divisors is an integer number (2067480).

Almost surely, 2^12266781 is an apocalyptic number.

It is an amenable number.

12266781 is a deficient number, since it is larger than the sum of its proper divisors (4273059).

12266781 is an equidigital number, since it uses as much as digits as its factorization.

12266781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46035.

The product of its digits is 8064, while the sum is 33.

The square root of 12266781 is about 3502.3964652792. The cubic root of 12266781 is about 230.6270287936.

The spelling of 12266781 in words is "twelve million, two hundred sixty-six thousand, seven hundred eighty-one".