1121544 has 48 divisors (see below), whose sum is σ = 3127020. Its totient is φ = 362880.

The previous prime is 1121543. The next prime is 1121557. The reversal of 1121544 is 4451211.

1121544 is a `hidden beast` number, since 1 + 121 + 544 = 666.

1121544 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 1102500 + 19044 = 1050^2 + 138^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1121543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2454 + ... + 2874.

2^1121544 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 1121544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563510).

1121544 is an abundant number, since it is smaller than the sum of its proper divisors (2005476).

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

1121544 is a wasteful number, since it uses less digits than its factorization.

1121544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 463 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1121544 is about 1059.0297446248. The cubic root of 1121544 is about 103.8975816181.

Multiplying 1121544 by its product of digits (160), we get a triangular number (179447040 = T₁₈₉₄₄).

Adding to 1121544 its reverse (4451211), we get a palindrome (5572755).

The spelling of 1121544 in words is "one million, one hundred twenty-one thousand, five hundred forty-four".