12255581 has 8 divisors (see below), whose sum is σ = 13228320. Its totient is φ = 11287152.

The previous prime is 12255533. The next prime is 12255587. The reversal of 12255581 is 18555221.

12255581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12255581 - 2⁶ = 12255517 is a prime.

It is a super-2 number, since 2×12255581² = 300398531295122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12255587) 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, 7286 + ... + 8808.

It is an arithmetic number, because the mean of its divisors is an integer number (1653540).

Almost surely, 2^12255581 is an apocalyptic number.

It is an amenable number.

12255581 is a deficient number, since it is larger than the sum of its proper divisors (972739).

12255581 is a wasteful number, since it uses less digits than its factorization.

12255581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155.

The product of its digits is 4000, while the sum is 29.

The square root of 12255581 is about 3500.7971949258. The cubic root of 12255581 is about 230.5568172401.

The spelling of 12255581 in words is "twelve million, two hundred fifty-five thousand, five hundred eighty-one".