12012258 has 16 divisors (see below), whose sum is σ = 24314976. Its totient is φ = 3955680.

The previous prime is 12012257. The next prime is 12012263. The reversal of 12012258 is 85221021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12012257) 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, 11563 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (1519686).

Almost surely, 2^12012258 is an apocalyptic number.

12012258 is an abundant number, since it is smaller than the sum of its proper divisors (12302718).

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

12012258 is a wasteful number, since it uses less digits than its factorization.

12012258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24209.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12012258 is about 3465.8704534359. The cubic root of 12012258 is about 229.0207770219.

Adding to 12012258 its reverse (85221021), we get a palindrome (97233279).

The spelling of 12012258 in words is "twelve million, twelve thousand, two hundred fifty-eight".