12293281 has 16 divisors (see below), whose sum is σ = 16507008. Its totient is φ = 8841600.

The previous prime is 12293279. The next prime is 12293291. The reversal of 12293281 is 18239221.

12293281 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12293281 - 2¹ = 12293279 is a prime.

It is a super-2 number, since 2×12293281² = 302249515489922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12293221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5140 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (1031688).

Almost surely, 2^12293281 is an apocalyptic number.

12293281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12293281 is a deficient number, since it is larger than the sum of its proper divisors (4213727).

12293281 is a wasteful number, since it uses less digits than its factorization.

12293281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12312.

The product of its digits is 1728, while the sum is 28.

The square root of 12293281 is about 3506.1775482711. The cubic root of 12293281 is about 230.7929843270.

The spelling of 12293281 in words is "twelve million, two hundred ninety-three thousand, two hundred eighty-one".