1123647 has 8 divisors (see below), whose sum is σ = 1712256. Its totient is φ = 642072.

The previous prime is 1123637. The next prime is 1123651. The reversal of 1123647 is 7463211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123647 - 2⁴ = 1123631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26733 + ... + 26774.

It is an arithmetic number, because the mean of its divisors is an integer number (214032).

2^1123647 is an apocalyptic number.

1123647 is a deficient number, since it is larger than the sum of its proper divisors (588609).

1123647 is an equidigital number, since it uses as much as digits as its factorization.

1123647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53517.

The product of its digits is 1008, while the sum is 24.

The square root of 1123647 is about 1060.0221695795. The cubic root of 1123647 is about 103.9624803021.

Adding to 1123647 its reverse (7463211), we get a palindrome (8586858).

It can be divided in two parts, 1123 and 647, that added together give a triangular number (1770 = T₅₉).

The spelling of 1123647 in words is "one million, one hundred twenty-three thousand, six hundred forty-seven".