1447220 has 18 divisors (see below), whose sum is σ = 3050502. Its totient is φ = 576736.

The previous prime is 1447219. The next prime is 1447223. The reversal of 1447220 is 227441.

It can be written as a sum of positive squares in 3 ways, for example, as 59536 + 1387684 = 244^2 + 1178^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1447192 and 1447201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1447223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5246 + ... + 5514.

2^1447220 is an apocalyptic number.

1447220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1447220 is an abundant number, since it is smaller than the sum of its proper divisors (1603282).

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

1447220 is an equidigital number, since it uses as much as digits as its factorization.

1447220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1447220 is about 1203.0045718949. The cubic root of 1447220 is about 113.1127389212.

Multiplying 1447220 by its sum of digits (20), we get a square (28944400 = 5380²).

1447220 divided by its sum of digits (20) gives a square (72361 = 269²).

The spelling of 1447220 in words is "one million, four hundred forty-seven thousand, two hundred twenty".