1121648 has 20 divisors (see below), whose sum is σ = 2371128. Its totient is φ = 509760.

The previous prime is 1121629. The next prime is 1121651. The reversal of 1121648 is 8461211.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3011 + ... + 3362.

2^1121648 is an apocalyptic number.

It is an amenable number.

1121648 is an abundant number, since it is smaller than the sum of its proper divisors (1249480).

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

1121648 is a wasteful number, since it uses less digits than its factorization.

1121648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392 (or 6386 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 1121648 is about 1059.0788450347. The cubic root of 1121648 is about 103.9007929691.

Adding to 1121648 its reverse (8461211), we get a palindrome (9582859).

The spelling of 1121648 in words is "one million, one hundred twenty-one thousand, six hundred forty-eight".