1123649 has 8 divisors (see below), whose sum is σ = 1200168. Its totient is φ = 1048320.

The previous prime is 1123637. The next prime is 1123651. The reversal of 1123649 is 9463211.

It can be written as a sum of positive squares in 4 ways, for example, as 6400 + 1117249 = 80^2 + 1057^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123669) 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 7 ways as a sum of consecutive naturals, for example, 2459 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (150021).

2^1123649 is an apocalyptic number.

It is an amenable number.

1123649 is a deficient number, since it is larger than the sum of its proper divisors (76519).

1123649 is a wasteful number, since it uses less digits than its factorization.

1123649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its digits is 1296, while the sum is 26.

The square root of 1123649 is about 1060.0231129556. The cubic root of 1123649 is about 103.9625419836.

It can be divided in two parts, 11236 and 49, that multiplied together give a square (550564 = 742²).

The spelling of 1123649 in words is "one million, one hundred twenty-three thousand, six hundred forty-nine".