12551418 has 24 divisors (see below), whose sum is σ = 29667456. Its totient is φ = 3803400.

The previous prime is 12551417. The next prime is 12551437. The reversal of 12551418 is 81415521.

It is a junction number, because it is equal to n+sod(n) for n = 12551391 and 12551400.

It is not an unprimeable number, because it can be changed into a prime (12551417) 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, 31498 + ... + 31893.

It is an arithmetic number, because the mean of its divisors is an integer number (1236144).

Almost surely, 2^12551418 is an apocalyptic number.

12551418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12551418 is an abundant number, since it is smaller than the sum of its proper divisors (17116038).

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

12551418 is a wasteful number, since it uses less digits than its factorization.

12551418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63410 (or 63407 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 12551418 is about 3542.7980467422. The cubic root of 12551418 is about 232.3972213085.

Adding to 12551418 its reverse (81415521), we get a palindrome (93966939).

The spelling of 12551418 in words is "twelve million, five hundred fifty-one thousand, four hundred eighteen".