12143140 has 12 divisors (see below), whose sum is σ = 25500636. Its totient is φ = 4857248.

The previous prime is 12143137. The next prime is 12143143. The reversal of 12143140 is 4134121.

It is an interprime number because it is at equal distance from previous prime (12143137) and next prime (12143143).

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 8479744 = 1914^2 + 2912^2 .

It is not an unprimeable number, because it can be changed into a prime (12143143) 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, 303559 + ... + 303598.

It is an arithmetic number, because the mean of its divisors is an integer number (2125053).

Almost surely, 2^12143140 is an apocalyptic number.

12143140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143140 is an abundant number, since it is smaller than the sum of its proper divisors (13357496).

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

12143140 is a wasteful number, since it uses less digits than its factorization.

12143140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607166 (or 607164 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12143140 is about 3484.7008479926. The cubic root of 12143140 is about 229.8495550483.

Adding to 12143140 its reverse (4134121), we get a palindrome (16277261).

The spelling of 12143140 in words is "twelve million, one hundred forty-three thousand, one hundred forty".