12555956 has 54 divisors (see below), whose sum is σ = 27016290. Its totient is φ = 5085024.

The previous prime is 12555947. The next prime is 12555989. The reversal of 12555956 is 65955521.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 1731856 = 3290^2 + 1316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 267125 + ... + 267171.

Almost surely, 2^12555956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12555956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13508145).

12555956 is an abundant number, since it is smaller than the sum of its proper divisors (14460334).

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

12555956 is a wasteful number, since it uses less digits than its factorization.

12555956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 85 counting only the distinct ones).

The product of its digits is 67500, while the sum is 38.

The square root of 12555956 is about 3543.4384430945. The cubic root of 12555956 is about 232.4252258871.

The spelling of 12555956 in words is "twelve million, five hundred fifty-five thousand, nine hundred fifty-six".