14821220 has 12 divisors (see below), whose sum is σ = 31124604. Its totient is φ = 5928480.

The previous prime is 14821217. The next prime is 14821237. The reversal of 14821220 is 2212841.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3356224 + 11464996 = 1832^2 + 3386^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 741061 = 14821220 / (1 + 4 + 8 + 2 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 14821192 and 14821201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370511 + ... + 370550.

It is an arithmetic number, because the mean of its divisors is an integer number (2593717).

Almost surely, 2^14821220 is an apocalyptic number.

14821220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14821220 is an abundant number, since it is smaller than the sum of its proper divisors (16303384).

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

14821220 is a wasteful number, since it uses less digits than its factorization.

14821220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741070 (or 741068 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 14821220 is about 3849.8337626448. The cubic root of 14821220 is about 245.6374901655.

The spelling of 14821220 in words is "fourteen million, eight hundred twenty-one thousand, two hundred twenty".