12281129 has 4 divisors (see below), whose sum is σ = 14035584. Its totient is φ = 10526676.

The previous prime is 12281117. The next prime is 12281131. The reversal of 12281129 is 92118221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12281129 - 2¹² = 12277033 is a prime.

It is a super-2 number, since 2×12281129² = 301652259029282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12281098 and 12281107.

It is not an unprimeable number, because it can be changed into a prime (12281029) 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 3 ways as a sum of consecutive naturals, for example, 877217 + ... + 877230.

It is an arithmetic number, because the mean of its divisors is an integer number (3508896).

Almost surely, 2^12281129 is an apocalyptic number.

It is an amenable number.

12281129 is a deficient number, since it is larger than the sum of its proper divisors (1754455).

12281129 is an equidigital number, since it uses as much as digits as its factorization.

12281129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754454.

The product of its digits is 576, while the sum is 26.

The square root of 12281129 is about 3504.4441784682. Note that the first 3 decimals coincide. The cubic root of 12281129 is about 230.7169123932.

The spelling of 12281129 in words is "twelve million, two hundred eighty-one thousand, one hundred twenty-nine".