13221474 has 24 divisors (see below), whose sum is σ = 30760848. Its totient is φ = 3777480.

The previous prime is 13221457. The next prime is 13221479. The reversal of 13221474 is 47412231.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13221479) 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 11 ways as a sum of consecutive naturals, for example, 22192 + ... + 22779.

It is an arithmetic number, because the mean of its divisors is an integer number (1281702).

Almost surely, 2^13221474 is an apocalyptic number.

13221474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13221474 is an abundant number, since it is smaller than the sum of its proper divisors (17539374).

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

13221474 is a wasteful number, since it uses less digits than its factorization.

13221474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44990 (or 44983 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 13221474 is about 3636.1344859617. The cubic root of 13221474 is about 236.4612376820.

It can be divided in two parts, 13221 and 474, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 13221474 in words is "thirteen million, two hundred twenty-one thousand, four hundred seventy-four".