12538381 has 8 divisors (see below), whose sum is σ = 13124160. Its totient is φ = 11956032.

The previous prime is 12538363. The next prime is 12538391. The reversal of 12538381 is 18383521.

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

It is a cyclic number.

It is not a de Polignac number, because 12538381 - 2⁹ = 12537869 is a prime.

It is a super-2 number, since 2×12538381² = 314421996202322, 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 (12538321) 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 7 ways as a sum of consecutive naturals, for example, 9330 + ... + 10588.

It is an arithmetic number, because the mean of its divisors is an integer number (1640520).

Almost surely, 2^12538381 is an apocalyptic number.

It is an amenable number.

12538381 is a deficient number, since it is larger than the sum of its proper divisors (585779).

12538381 is a wasteful number, since it uses less digits than its factorization.

12538381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715.

The product of its digits is 5760, while the sum is 31.

The square root of 12538381 is about 3540.9576388316. The cubic root of 12538381 is about 232.3167307437.

The spelling of 12538381 in words is "twelve million, five hundred thirty-eight thousand, three hundred eighty-one".