12255981 has 8 divisors (see below), whose sum is σ = 16548480. Its totient is φ = 8067072.

The previous prime is 12255979. The next prime is 12255983. The reversal of 12255981 is 18955221.

It is an interprime number because it is at equal distance from previous prime (12255979) and next prime (12255983).

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

It is not a de Polignac number, because 12255981 - 2¹ = 12255979 is a prime.

It is a super-2 number, since 2×12255981² = 300418140544722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12255983) 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 7 ways as a sum of consecutive naturals, for example, 25620 + ... + 26093.

It is an arithmetic number, because the mean of its divisors is an integer number (2068560).

Almost surely, 2^12255981 is an apocalyptic number.

It is an amenable number.

12255981 is a deficient number, since it is larger than the sum of its proper divisors (4292499).

12255981 is an equidigital number, since it uses as much as digits as its factorization.

12255981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51795.

The product of its digits is 7200, while the sum is 33.

The square root of 12255981 is about 3500.8543243043. The cubic root of 12255981 is about 230.5593255320.

The spelling of 12255981 in words is "twelve million, two hundred fifty-five thousand, nine hundred eighty-one".