12402243 has 18 divisors (see below), whose sum is σ = 20839884. Its totient is φ = 7086744.

The previous prime is 12402241. The next prime is 12402251. The reversal of 12402243 is 34220421.

It is not a de Polignac number, because 12402243 - 2¹ = 12402241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12402241) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13621 + ... + 14502.

Almost surely, 2^12402243 is an apocalyptic number.

12402243 is a deficient number, since it is larger than the sum of its proper divisors (8437641).

12402243 is a wasteful number, since it uses less digits than its factorization.

12402243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28143 (or 28133 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12402243 is about 3521.6818425292. The cubic root of 12402243 is about 231.4728605877.

Adding to 12402243 its reverse (34220421), we get a palindrome (46622664).

The spelling of 12402243 in words is "twelve million, four hundred two thousand, two hundred forty-three".