12743145 has 12 divisors (see below), whose sum is σ = 22088196. Its totient is φ = 6796320.

The previous prime is 12743141. The next prime is 12743147. The reversal of 12743145 is 54134721.

12743145 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 can be written as a sum of positive squares in 2 ways, for example, as 7225344 + 5517801 = 2688^2 + 2349^2 .

It is not a de Polignac number, because 12743145 - 2² = 12743141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12743141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141546 + ... + 141635.

It is an arithmetic number, because the mean of its divisors is an integer number (1840683).

Almost surely, 2^12743145 is an apocalyptic number.

12743145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12743145 is a deficient number, since it is larger than the sum of its proper divisors (9345051).

12743145 is a wasteful number, since it uses less digits than its factorization.

12743145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283192 (or 283189 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 12743145 is about 3569.7541932184. The cubic root of 12743145 is about 233.5745611822.

Adding to 12743145 its reverse (54134721), we get a palindrome (66877866).

The spelling of 12743145 in words is "twelve million, seven hundred forty-three thousand, one hundred forty-five".