12126855 has 16 divisors (see below), whose sum is σ = 20895840. Its totient is φ = 5970048.

The previous prime is 12126853. The next prime is 12126869. The reversal of 12126855 is 55862121.

It is not a de Polignac number, because 12126855 - 2¹ = 12126853 is a prime.

It is a super-2 number, since 2×12126855² = 294121224382050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30900 + ... + 31289.

It is an arithmetic number, because the mean of its divisors is an integer number (1305990).

Almost surely, 2^12126855 is an apocalyptic number.

12126855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12126855 is a deficient number, since it is larger than the sum of its proper divisors (8768985).

12126855 is a wasteful number, since it uses less digits than its factorization.

12126855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62210.

The product of its digits is 4800, while the sum is 30.

The square root of 12126855 is about 3482.3634215860. The cubic root of 12126855 is about 229.7467597108.

Adding to 12126855 its reverse (55862121), we get a palindrome (67988976).

The spelling of 12126855 in words is "twelve million, one hundred twenty-six thousand, eight hundred fifty-five".