1124721 has 12 divisors (see below), whose sum is σ = 1749748. Its totient is φ = 692064.

The previous prime is 1124719. The next prime is 1124741. The reversal of 1124721 is 1274211.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 378225 = 864^2 + 615^2 .

It is not a de Polignac number, because 1124721 - 2¹ = 1124719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1124694 and 1124703.

It is not an unprimeable number, because it can be changed into a prime (1124741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4690 + ... + 4923.

2^1124721 is an apocalyptic number.

It is an amenable number.

1124721 is a deficient number, since it is larger than the sum of its proper divisors (625027).

1124721 is a wasteful number, since it uses less digits than its factorization.

1124721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9632 (or 9629 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1124721 is about 1060.5286417632. The cubic root of 1124721 is about 103.9955927620.

Adding to 1124721 its reverse (1274211), we get a palindrome (2398932).

The spelling of 1124721 in words is "one million, one hundred twenty-four thousand, seven hundred twenty-one".