12551436 has 72 divisors (see below), whose sum is σ = 33888400. Its totient is φ = 4059072.

The previous prime is 12551417. The next prime is 12551437. The reversal of 12551436 is 63415521.

12551436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12551437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35790 + ... + 36138.

Almost surely, 2^12551436 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 12551436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16944200).

12551436 is an abundant number, since it is smaller than the sum of its proper divisors (21336964).

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

12551436 is a wasteful number, since it uses less digits than its factorization.

12551436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 391 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12551436 is about 3542.8005871062. The cubic root of 12551436 is about 232.3973324021.

Adding to 12551436 its reverse (63415521), we get a palindrome (75966957).

The spelling of 12551436 in words is "twelve million, five hundred fifty-one thousand, four hundred thirty-six".