12281869 has 4 divisors (see below), whose sum is σ = 12288960. Its totient is φ = 12274780.

The previous prime is 12281831. The next prime is 12281881. The reversal of 12281869 is 96818221.

12281869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96818221 = 73 ⋅1326277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12281869 is a prime.

It is a super-2 number, since 2×12281869² = 301688612266322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12284869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972 + ... + 5050.

It is an arithmetic number, because the mean of its divisors is an integer number (3072240).

Almost surely, 2^12281869 is an apocalyptic number.

It is an amenable number.

12281869 is a deficient number, since it is larger than the sum of its proper divisors (7091).

12281869 is an equidigital number, since it uses as much as digits as its factorization.

12281869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7090.

The product of its digits is 13824, while the sum is 37.

The square root of 12281869 is about 3504.5497571015. The cubic root of 12281869 is about 230.7215462529.

The spelling of 12281869 in words is "twelve million, two hundred eighty-one thousand, eight hundred sixty-nine".