12543730 has 8 divisors (see below), whose sum is σ = 22578732. Its totient is φ = 5017488.

The previous prime is 12543701. The next prime is 12543733. The reversal of 12543730 is 3734521.

It can be written as a sum of positive squares in 2 ways, for example, as 12229009 + 314721 = 3497^2 + 561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12543695 and 12543704.

It is not an unprimeable number, because it can be changed into a prime (12543733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627177 + ... + 627196.

Almost surely, 2^12543730 is an apocalyptic number.

12543730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12543730 is a deficient number, since it is larger than the sum of its proper divisors (10035002).

12543730 is a wasteful number, since it uses less digits than its factorization.

12543730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254380.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 12543730 is about 3541.7128624438. The cubic root of 12543730 is about 232.3497622684.

The spelling of 12543730 in words is "twelve million, five hundred forty-three thousand, seven hundred thirty".