12143420 has 24 divisors (see below), whose sum is σ = 25676448. Its totient is φ = 4824000.

The previous prime is 12143407. The next prime is 12143429. The reversal of 12143420 is 2434121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (1069852).

Almost surely, 2^12143420 is an apocalyptic number.

12143420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143420 is an abundant number, since it is smaller than the sum of its proper divisors (13533028).

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

12143420 is a wasteful number, since it uses less digits than its factorization.

12143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 12143420 is about 3484.7410233761. The cubic root of 12143420 is about 229.8513216803.

Adding to 12143420 its reverse (2434121), we get a palindrome (14577541).

The spelling of 12143420 in words is "twelve million, one hundred forty-three thousand, four hundred twenty".