12221470 has 64 divisors (see below), whose sum is σ = 25116480. Its totient is φ = 4257792.

The previous prime is 12221459. The next prime is 12221483. The reversal of 12221470 is 7412221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182377 + ... + 182443.

It is an arithmetic number, because the mean of its divisors is an integer number (392445).

Almost surely, 2^12221470 is an apocalyptic number.

12221470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12221470 is an abundant number, since it is smaller than the sum of its proper divisors (12895010).

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

12221470 is a wasteful number, since it uses less digits than its factorization.

12221470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12221470 is about 3495.9219098830. The cubic root of 12221470 is about 230.3427152908.

Adding to 12221470 its reverse (7412221), we get a palindrome (19633691).

Subtracting from 12221470 its reverse (7412221), we obtain a square (4809249 = 2193²).

The spelling of 12221470 in words is "twelve million, two hundred twenty-one thousand, four hundred seventy".