13221468 has 120 divisors (see below), whose sum is σ = 38609648. Its totient is φ = 3919104.

The previous prime is 13221457. The next prime is 13221479. The reversal of 13221468 is 86412231.

It is an interprime number because it is at equal distance from previous prime (13221457) and next prime (13221479).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 181080 + ... + 181152.

Almost surely, 2^13221468 is an apocalyptic number.

13221468 is a gapful number since it is divisible by the number (18) 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 13221468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19304824).

13221468 is an abundant number, since it is smaller than the sum of its proper divisors (25388180).

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

13221468 is a wasteful number, since it uses less digits than its factorization.

13221468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 134 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 13221468 is about 3636.1336609096. The cubic root of 13221468 is about 236.4612019128.

Adding to 13221468 its reverse (86412231), we get a palindrome (99633699).

It can be divided in two parts, 13221 and 468, that added together give a square (13689 = 117²).

The spelling of 13221468 in words is "thirteen million, two hundred twenty-one thousand, four hundred sixty-eight".