12543992 has 8 divisors (see below), whose sum is σ = 23520000. Its totient is φ = 6271992.

The previous prime is 12543989. The next prime is 12543997. The reversal of 12543992 is 29934521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×12543992³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783992 + ... + 784007.

It is an arithmetic number, because the mean of its divisors is an integer number (2940000).

Almost surely, 2^12543992 is an apocalyptic number.

It is an amenable number.

12543992 is a deficient number, since it is larger than the sum of its proper divisors (10976008).

12543992 is a wasteful number, since it uses less digits than its factorization.

12543992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568005 (or 1568001 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 12543992 is about 3541.7498500035. The cubic root of 12543992 is about 232.3513799481.

The spelling of 12543992 in words is "twelve million, five hundred forty-three thousand, nine hundred ninety-two".