12555738 has 24 divisors (see below), whose sum is σ = 29297268. Its totient is φ = 3863232.

The previous prime is 12555737. The next prime is 12555743. The reversal of 12555738 is 83755521.

It can be written as a sum of positive squares in 2 ways, for example, as 12510369 + 45369 = 3537^2 + 213^2 .

It is not an unprimeable number, because it can be changed into a prime (12555737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26595 + ... + 27062.

Almost surely, 2^12555738 is an apocalyptic number.

12555738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12555738 is an abundant number, since it is smaller than the sum of its proper divisors (16741530).

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

12555738 is a wasteful number, since it uses less digits than its factorization.

12555738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53678 (or 53675 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 12555738 is about 3543.4076818791. The cubic root of 12555738 is about 232.4238807355.

The spelling of 12555738 in words is "twelve million, five hundred fifty-five thousand, seven hundred thirty-eight".