12144140 has 24 divisors (see below), whose sum is σ = 26193552. Its totient is φ = 4726080.

The previous prime is 12144131. The next prime is 12144151. The reversal of 12144140 is 4144121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7466 + ... + 8945.

It is an arithmetic number, because the mean of its divisors is an integer number (1091398).

Almost surely, 2^12144140 is an apocalyptic number.

12144140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12144140 is an abundant number, since it is smaller than the sum of its proper divisors (14049412).

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

12144140 is a wasteful number, since it uses less digits than its factorization.

12144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16457 (or 16455 counting only the distinct ones).

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

The square root of 12144140 is about 3484.8443293783. The cubic root of 12144140 is about 229.8558643238.

Adding to 12144140 its reverse (4144121), we get a palindrome (16288261).

The spelling of 12144140 in words is "twelve million, one hundred forty-four thousand, one hundred forty".