12381140 has 12 divisors (see below), whose sum is σ = 26000436. Its totient is φ = 4952448.

The previous prime is 12381113. The next prime is 12381167. The reversal of 12381140 is 4118321.

It is an interprime number because it is at equal distance from previous prime (12381113) and next prime (12381167).

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 6980164 = 2324^2 + 2642^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 619057 = 12381140 / (1 + 2 + 3 + 8 + 1 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309509 + ... + 309548.

It is an arithmetic number, because the mean of its divisors is an integer number (2166703).

Almost surely, 2^12381140 is an apocalyptic number.

12381140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12381140 is an abundant number, since it is smaller than the sum of its proper divisors (13619296).

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

12381140 is a wasteful number, since it uses less digits than its factorization.

12381140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619066 (or 619064 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 12381140 is about 3518.6844132431. The cubic root of 12381140 is about 231.3414987322.

Adding to 12381140 its reverse (4118321), we get a palindrome (16499461).

It can be divided in two parts, 12381 and 140, that added together give a palindrome (12521).

The spelling of 12381140 in words is "twelve million, three hundred eighty-one thousand, one hundred forty".