1123641 has 12 divisors (see below), whose sum is σ = 1708720. Its totient is φ = 709560.

The previous prime is 1123637. The next prime is 1123651. The reversal of 1123641 is 1463211.

It is a happy number.

1123641 is a `hidden beast` number, since 1 + 1 + 23 + 641 = 666.

It is not a de Polignac number, because 1123641 - 2² = 1123637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123601) 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, 3115 + ... + 3456.

2^1123641 is an apocalyptic number.

It is an amenable number.

1123641 is a deficient number, since it is larger than the sum of its proper divisors (585079).

1123641 is a wasteful number, since it uses less digits than its factorization.

1123641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6596 (or 6593 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1123641 is about 1060.0193394462. The cubic root of 1123641 is about 103.9622952570.

Adding to 1123641 its reverse (1463211), we get a palindrome (2586852).

It can be divided in two parts, 1123 and 641, that added together give a square (1764 = 42²).

The spelling of 1123641 in words is "one million, one hundred twenty-three thousand, six hundred forty-one".