12143730 has 32 divisors (see below), whose sum is σ = 29502144. Its totient is φ = 3198656.

The previous prime is 12143713. The next prime is 12143737. The reversal of 12143730 is 3734121.

12143730 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12143697 and 12143706.

It is not an unprimeable number, because it can be changed into a prime (12143737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (921942).

Almost surely, 2^12143730 is an apocalyptic number.

12143730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12143730 is an abundant number, since it is smaller than the sum of its proper divisors (17358414).

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

12143730 is a wasteful number, since it uses less digits than its factorization.

12143730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 12143730 is about 3484.7855027247. The cubic root of 12143730 is about 229.8532775627.

Adding to 12143730 its reverse (3734121), we get a palindrome (15877851).

The spelling of 12143730 in words is "twelve million, one hundred forty-three thousand, seven hundred thirty".