12543430 has 16 divisors (see below), whose sum is σ = 22949424. Its totient is φ = 4934880.

The previous prime is 12543413. The next prime is 12543449. The reversal of 12543430 is 3434521.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9672 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (1434339).

Almost surely, 2^12543430 is an apocalyptic number.

12543430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12543430 is a deficient number, since it is larger than the sum of its proper divisors (10405994).

12543430 is a wasteful number, since it uses less digits than its factorization.

12543430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20631.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 12543430 is about 3541.6705098018. The cubic root of 12543430 is about 232.3479099356.

Adding to 12543430 its reverse (3434521), we get a palindrome (15977951).

The spelling of 12543430 in words is "twelve million, five hundred forty-three thousand, four hundred thirty".