1029220 has 12 divisors (see below), whose sum is σ = 2161404. Its totient is φ = 411680.

The previous prime is 1029209. The next prime is 1029247. The reversal of 1029220 is 229201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 401956 + 627264 = 634^2 + 792^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1029194 and 1029203.

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, 25711 + ... + 25750.

It is an arithmetic number, because the mean of its divisors is an integer number (180117).

2^1029220 is an apocalyptic number.

1029220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1029220 is an abundant number, since it is smaller than the sum of its proper divisors (1132184).

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

1029220 is a wasteful number, since it uses less digits than its factorization.

1029220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51470 (or 51468 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1029220 is about 1014.5048053114. The cubic root of 1029220 is about 100.9646643046.

The spelling of 1029220 in words is "one million, twenty-nine thousand, two hundred twenty".