12432258 has 16 divisors (see below), whose sum is σ = 27627360. Its totient is φ = 4144068.

The previous prime is 12432257. The next prime is 12432269. The reversal of 12432258 is 85223421.

It is a super-2 number, since 2×12432258² = 309122077957128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12432257) 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 7 ways as a sum of consecutive naturals, for example, 115060 + ... + 115167.

It is an arithmetic number, because the mean of its divisors is an integer number (1726710).

Almost surely, 2^12432258 is an apocalyptic number.

12432258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12432258 is an abundant number, since it is smaller than the sum of its proper divisors (15195102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12432258 is a wasteful number, since it uses less digits than its factorization.

12432258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230238 (or 230232 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 12432258 is about 3525.9407255369. The cubic root of 12432258 is about 231.6594413725.

Adding to 12432258 its reverse (85223421), we get a palindrome (97655679).

The spelling of 12432258 in words is "twelve million, four hundred thirty-two thousand, two hundred fifty-eight".