12543842 has 8 divisors (see below), whose sum is σ = 18913836. Its totient is φ = 6239232.

The previous prime is 12543833. The next prime is 12543859. The reversal of 12543842 is 24834521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12524521 + 19321 = 3539^2 + 139^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15863 + ... + 16634.

Almost surely, 2^12543842 is an apocalyptic number.

12543842 is a deficient number, since it is larger than the sum of its proper divisors (6369994).

12543842 is a wasteful number, since it uses less digits than its factorization.

12543842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32692.

The product of its digits is 7680, while the sum is 29.

The square root of 12543842 is about 3541.7286739670. The cubic root of 12543842 is about 232.3504537983.

The spelling of 12543842 in words is "twelve million, five hundred forty-three thousand, eight hundred forty-two".