12540245212 has 24 divisors (see below), whose sum is σ = 24277663872. Its totient is φ = 5619826800.

The previous prime is 12540245203. The next prime is 12540245257. The reversal of 12540245212 is 21254204521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003958 + ... + 2010205.

It is an arithmetic number, because the mean of its divisors is an integer number (1011569328).

Almost surely, 2^12540245212 is an apocalyptic number.

It is an amenable number.

12540245212 is a deficient number, since it is larger than the sum of its proper divisors (11737418660).

12540245212 is a wasteful number, since it uses less digits than its factorization.

12540245212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014249 (or 4014247 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 12540245212 its reverse (21254204521), we get a palindrome (33794449733).

It can be divided in two parts, 12540 and 245212, that added together give a palindrome (257752).

The spelling of 12540245212 in words is "twelve billion, five hundred forty million, two hundred forty-five thousand, two hundred twelve".