1221248 has 64 divisors (see below), whose sum is σ = 2937600. Its totient is φ = 494592.

The previous prime is 1221247. The next prime is 1221251. The reversal of 1221248 is 8421221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1221247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25961 + ... + 26007.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2^1221248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468800).

1221248 is an abundant number, since it is smaller than the sum of its proper divisors (1716352).

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

1221248 is an equidigital number, since it uses as much as digits as its factorization.

1221248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 85 counting only the distinct ones).

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

The square root of 1221248 is about 1105.1009003706. The cubic root of 1221248 is about 106.8893957103.

Adding to 1221248 its reverse (8421221), we get a palindrome (9642469).

The spelling of 1221248 in words is "one million, two hundred twenty-one thousand, two hundred forty-eight".