12381404 has 12 divisors (see below), whose sum is σ = 24762864. Its totient is φ = 5306304.

The previous prime is 12381379. The next prime is 12381409. The reversal of 12381404 is 40418321.

12381404 is an admirable number.

It is a super-2 number, since 2×12381404² = 306598330022432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12381404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221069 + ... + 221124.

It is an arithmetic number, because the mean of its divisors is an integer number (2063572).

Almost surely, 2^12381404 is an apocalyptic number.

12381404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12381404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12381404 is a wasteful number, since it uses less digits than its factorization.

12381404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442204 (or 442202 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 12381404 is about 3518.7219270639. The cubic root of 12381404 is about 231.3431429998.

Adding to 12381404 its reverse (40418321), we get a palindrome (52799725).

The spelling of 12381404 in words is "twelve million, three hundred eighty-one thousand, four hundred four".