1222648 has 24 divisors (see below), whose sum is σ = 2667600. Its totient is φ = 523824.

The previous prime is 1222643. The next prime is 1222651. The reversal of 1222648 is 8462221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222643) 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, 1168 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (111150).

2^1222648 is an apocalyptic number.

It is an amenable number.

1222648 is an abundant number, since it is smaller than the sum of its proper divisors (1444952).

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

1222648 is a wasteful number, since it uses less digits than its factorization.

1222648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139 (or 3128 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 1222648 is about 1105.7341452628. The cubic root of 1222648 is about 106.9302249843.

Adding to 1222648 its reverse (8462221), we get a palindrome (9684869).

The spelling of 1222648 in words is "one million, two hundred twenty-two thousand, six hundred forty-eight".