12239381 has 16 divisors (see below), whose sum is σ = 15925248. Its totient is φ = 9121200.

The previous prime is 12239351. The next prime is 12239393. The reversal of 12239381 is 18393221.

12239381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12239381 - 2²² = 8045077 is a prime.

It is a super-2 number, since 2×12239381² = 299604894526322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685 + ... + 5226.

It is an arithmetic number, because the mean of its divisors is an integer number (995328).

Almost surely, 2^12239381 is an apocalyptic number.

12239381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12239381 is a deficient number, since it is larger than the sum of its proper divisors (3685867).

12239381 is a wasteful number, since it uses less digits than its factorization.

12239381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6952.

The product of its digits is 2592, while the sum is 29.

The square root of 12239381 is about 3498.4826711019. The cubic root of 12239381 is about 230.4551855194.

The spelling of 12239381 in words is "twelve million, two hundred thirty-nine thousand, three hundred eighty-one".