12281181 has 32 divisors (see below), whose sum is σ = 18990720. Its totient is φ = 6988800.

The previous prime is 12281173. The next prime is 12281183. The reversal of 12281181 is 18118221.

It is not a de Polignac number, because 12281181 - 2³ = 12281173 is a prime.

It is a super-2 number, since 2×12281181² = 301654813509522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39081 + ... + 39393.

It is an arithmetic number, because the mean of its divisors is an integer number (593460).

Almost surely, 2^12281181 is an apocalyptic number.

12281181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12281181 is a deficient number, since it is larger than the sum of its proper divisors (6709539).

12281181 is a wasteful number, since it uses less digits than its factorization.

12281181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397.

The product of its digits is 256, while the sum is 24.

The square root of 12281181 is about 3504.4515976112. The cubic root of 12281181 is about 230.7172380219.

The spelling of 12281181 in words is "twelve million, two hundred eighty-one thousand, one hundred eighty-one".