12551841 has 20 divisors (see below), whose sum is σ = 18986352. Its totient is φ = 8262648.

The previous prime is 12551789. The next prime is 12551857. The reversal of 12551841 is 14815521.

It is not a de Polignac number, because 12551841 - 2¹⁷ = 12420769 is a prime.

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 (12551881) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5790 + ... + 7656.

Almost surely, 2^12551841 is an apocalyptic number.

12551841 is the 2241-st heptagonal number.

It is an amenable number.

12551841 is a deficient number, since it is larger than the sum of its proper divisors (6434511).

12551841 is an equidigital number, since it uses as much as digits as its factorization.

12551841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962 (or 1953 counting only the distinct ones).

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

The square root of 12551841 is about 3542.8577448156. The cubic root of 12551841 is about 232.3998319809.

The spelling of 12551841 in words is "twelve million, five hundred fifty-one thousand, eight hundred forty-one".