1121564 has 12 divisors (see below), whose sum is σ = 1974000. Its totient is φ = 557568.

The previous prime is 1121557. The next prime is 1121599. The reversal of 1121564 is 4651211.

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, 92 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (164500).

2^1121564 is an apocalyptic number.

It is an amenable number.

1121564 is a deficient number, since it is larger than the sum of its proper divisors (852436).

1121564 is a wasteful number, since it uses less digits than its factorization.

1121564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1121564 is about 1059.0391871881. The cubic root of 1121564 is about 103.8981992010.

Adding to 1121564 its reverse (4651211), we get a palindrome (5772775).

The spelling of 1121564 in words is "one million, one hundred twenty-one thousand, five hundred sixty-four".