12338781 has 16 divisors (see below), whose sum is σ = 20248704. Its totient is φ = 6508224.

The previous prime is 12338779. The next prime is 12338783. The reversal of 12338781 is 18783321.

It is an interprime number because it is at equal distance from previous prime (12338779) and next prime (12338783).

It is not a de Polignac number, because 12338781 - 2¹ = 12338779 is a prime.

It is a super-2 number, since 2×12338781² = 304491033131922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12338783) 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 15 ways as a sum of consecutive naturals, for example, 22326 + ... + 22871.

It is an arithmetic number, because the mean of its divisors is an integer number (1265544).

Almost surely, 2^12338781 is an apocalyptic number.

It is an amenable number.

12338781 is a deficient number, since it is larger than the sum of its proper divisors (7909923).

12338781 is a wasteful number, since it uses less digits than its factorization.

12338781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45220.

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

The square root of 12338781 is about 3512.6601031127. The cubic root of 12338781 is about 231.0773714323.

The spelling of 12338781 in words is "twelve million, three hundred thirty-eight thousand, seven hundred eighty-one".