12543240 has 32 divisors (see below), whose sum is σ = 37630080. Its totient is φ = 3344832.

The previous prime is 12543233. The next prime is 12543241. The reversal of 12543240 is 4234521.

12543240 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52144 + ... + 52383.

It is an arithmetic number, because the mean of its divisors is an integer number (1175940).

Almost surely, 2^12543240 is an apocalyptic number.

12543240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12543240 is an abundant number, since it is smaller than the sum of its proper divisors (25086840).

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

12543240 is a wasteful number, since it uses less digits than its factorization.

12543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104541 (or 104537 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 12543240 is about 3541.6436862000. The cubic root of 12543240 is about 232.3467367763.

Adding to 12543240 its reverse (4234521), we get a palindrome (16777761).

It can be divided in two parts, 125 and 43240, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 12543240 in words is "twelve million, five hundred forty-three thousand, two hundred forty".