1021248 has 70 divisors (see below), whose sum is σ = 3042666. Its totient is φ = 338688.

The previous prime is 1021243. The next prime is 1021253. The reversal of 1021248 is 8421201.

It is an interprime number because it is at equal distance from previous prime (1021243) and next prime (1021253).

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 5184 = 1008^2 + 72^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 4 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1021248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021243) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5086 + ... + 5282.

2^1021248 is an apocalyptic number.

1021248 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 1021248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521333).

1021248 is an abundant number, since it is smaller than the sum of its proper divisors (2021418).

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

1021248 is an equidigital number, since it uses as much as digits as its factorization.

1021248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1021248 is about 1010.5681570285. The cubic root of 1021248 is about 100.7033086400.

Adding to 1021248 its reverse (8421201), we get a palindrome (9442449).

The spelling of 1021248 in words is "one million, twenty-one thousand, two hundred forty-eight".