12543011 has 6 divisors (see below), whose sum is σ = 13582260. Its totient is φ = 11578008.

The previous prime is 12542989. The next prime is 12543053. The reversal of 12543011 is 11034521.

12543011 = 548² + 549² + ... + 586².

It is not a de Polignac number, because 12543011 - 2⁶ = 12542947 is a prime.

It is a super-2 number, since 2×12543011² = 314654249892242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36941 + ... + 37278.

It is an arithmetic number, because the mean of its divisors is an integer number (2263710).

Almost surely, 2^12543011 is an apocalyptic number.

12543011 is a deficient number, since it is larger than the sum of its proper divisors (1039249).

12543011 is an equidigital number, since it uses as much as digits as its factorization.

12543011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74245 (or 74232 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12543011 is about 3541.6113564309. The cubic root of 12543011 is about 232.3453227948.

Adding to 12543011 its reverse (11034521), we get a palindrome (23577532).

The spelling of 12543011 in words is "twelve million, five hundred forty-three thousand, eleven".