12942281 has 6 divisors (see below), whose sum is σ = 14225946. Its totient is φ = 11765600.

The previous prime is 12942233. The next prime is 12942301. The reversal of 12942281 is 18224921.

12942281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 3455881 = 3080^2 + 1859^2 .

It is not a de Polignac number, because 12942281 - 2¹⁸ = 12680137 is a prime.

It is a super-2 number, since 2×12942281² = 335005274965922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12942481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53360 + ... + 53601.

It is an arithmetic number, because the mean of its divisors is an integer number (2370991).

Almost surely, 2^12942281 is an apocalyptic number.

12942281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12942281 is a deficient number, since it is larger than the sum of its proper divisors (1283665).

12942281 is a wasteful number, since it uses less digits than its factorization.

12942281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106983 (or 106972 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 12942281 is about 3597.5381860378. The cubic root of 12942281 is about 234.7849609747.

The spelling of 12942281 in words is "twelve million, nine hundred forty-two thousand, two hundred eighty-one".