12221458 has 8 divisors (see below), whose sum is σ = 18564480. Its totient is φ = 6033300.

The previous prime is 12221449. The next prime is 12221459. The reversal of 12221458 is 85412221.

12221458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12221459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38518 + ... + 38833.

It is an arithmetic number, because the mean of its divisors is an integer number (2320560).

Almost surely, 2^12221458 is an apocalyptic number.

12221458 is a deficient number, since it is larger than the sum of its proper divisors (6343022).

12221458 is an equidigital number, since it uses as much as digits as its factorization.

12221458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77432.

The product of its digits is 1280, while the sum is 25.

The square root of 12221458 is about 3495.9201935971. The cubic root of 12221458 is about 230.3426399012.

Adding to 12221458 its reverse (85412221), we get a palindrome (97633679).

The spelling of 12221458 in words is "twelve million, two hundred twenty-one thousand, four hundred fifty-eight".