12381340 has 12 divisors (see below), whose sum is σ = 26000856. Its totient is φ = 4952528.

The previous prime is 12381329. The next prime is 12381349. The reversal of 12381340 is 4318321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381349) 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, 309514 + ... + 309553.

It is an arithmetic number, because the mean of its divisors is an integer number (2166738).

Almost surely, 2^12381340 is an apocalyptic number.

12381340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12381340 is an abundant number, since it is smaller than the sum of its proper divisors (13619516).

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

12381340 is a wasteful number, since it uses less digits than its factorization.

12381340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619076 (or 619074 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12381340 is about 3518.7128328410. The cubic root of 12381340 is about 231.3427443917.

Adding to 12381340 its reverse (4318321), we get a palindrome (16699661).

It can be divided in two parts, 12381 and 340, that added together give a palindrome (12721).

The spelling of 12381340 in words is "twelve million, three hundred eighty-one thousand, three hundred forty".