12705256 has 32 divisors (see below), whose sum is σ = 25496640. Its totient is φ = 5914368.

The previous prime is 12705229. The next prime is 12705271. The reversal of 12705256 is 65250721.

It is a super-2 number, since 2×12705256² = 322847060051072, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13555 + ... + 14461.

It is an arithmetic number, because the mean of its divisors is an integer number (796770).

Almost surely, 2^12705256 is an apocalyptic number.

It is an amenable number.

12705256 is an abundant number, since it is smaller than the sum of its proper divisors (12791384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12705256 is a wasteful number, since it uses less digits than its factorization.

12705256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 12705256 is about 3564.4432945412. The cubic root of 12705256 is about 233.3428368011.

Adding to 12705256 its reverse (65250721), we get a palindrome (77955977).

The spelling of 12705256 in words is "twelve million, seven hundred five thousand, two hundred fifty-six".