12221460 has 72 divisors (see below), whose sum is σ = 37957920. Its totient is φ = 3181248.

The previous prime is 12221459. The next prime is 12221483. The reversal of 12221460 is 6412221.

12221460 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6951 + ... + 8529.

Almost surely, 2^12221460 is an apocalyptic number.

12221460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18978960).

12221460 is an abundant number, since it is smaller than the sum of its proper divisors (25736460).

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

12221460 is a wasteful number, since it uses less digits than its factorization.

12221460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12221460 is about 3495.9204796448. The cubic root of 12221460 is about 230.3426524661.

Adding to 12221460 its reverse (6412221), we get a palindrome (18633681).

The spelling of 12221460 in words is "twelve million, two hundred twenty-one thousand, four hundred sixty".