12141440 has 64 divisors (see below), whose sum is σ = 29596320. Its totient is φ = 4761600.

The previous prime is 12141427. The next prime is 12141443. The reversal of 12141440 is 4414121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38885 + ... + 39195.

Almost surely, 2^12141440 is an apocalyptic number.

12141440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12141440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14798160).

12141440 is an abundant number, since it is smaller than the sum of its proper divisors (17454880).

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

12141440 is an equidigital number, since it uses as much as digits as its factorization.

12141440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 12141440 is about 3484.4569160775. The cubic root of 12141440 is about 229.8388284850.

Adding to 12141440 its reverse (4414121), we get a palindrome (16555561).

The spelling of 12141440 in words is "twelve million, one hundred forty-one thousand, four hundred forty".