12551855 has 8 divisors (see below), whose sum is σ = 15139872. Its totient is φ = 9989728.

The previous prime is 12551789. The next prime is 12551857. The reversal of 12551855 is 55815521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12551855 - 2¹⁰ = 12550831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5387 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (1892484).

Almost surely, 2^12551855 is an apocalyptic number.

12551855 is a deficient number, since it is larger than the sum of its proper divisors (2588017).

12551855 is a wasteful number, since it uses less digits than its factorization.

12551855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12945.

The product of its digits is 10000, while the sum is 32.

The square root of 12551855 is about 3542.8597206212. The cubic root of 12551855 is about 232.3999183851.

The spelling of 12551855 in words is "twelve million, five hundred fifty-one thousand, eight hundred fifty-five".