12543105 has 16 divisors (see below), whose sum is σ = 20410560. Its totient is φ = 6575808.

The previous prime is 12543103. The next prime is 12543107. The reversal of 12543105 is 50134521.

12543105 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 an interprime number because it is at equal distance from previous prime (12543103) and next prime (12543107).

It is not a de Polignac number, because 12543105 - 2¹ = 12543103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12543103) 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, 6202 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (1275660).

Almost surely, 2^12543105 is an apocalyptic number.

12543105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12543105 is a deficient number, since it is larger than the sum of its proper divisors (7867455).

12543105 is a wasteful number, since it uses less digits than its factorization.

12543105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12543105 is about 3541.6246272015. The cubic root of 12543105 is about 232.3459032085.

Adding to 12543105 its reverse (50134521), we get a palindrome (62677626).

The spelling of 12543105 in words is "twelve million, five hundred forty-three thousand, one hundred five".