1123605 has 64 divisors (see below), whose sum is σ = 2419200. Its totient is φ = 483840.

The previous prime is 1123601. The next prime is 1123621. The reversal of 1123605 is 5063211.

It is not a de Polignac number, because 1123605 - 2² = 1123601 is a prime.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 27385 + ... + 27425.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2^1123605 is an apocalyptic number.

1123605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123605 is an abundant number, since it is smaller than the sum of its proper divisors (1295595).

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

1123605 is a wasteful number, since it uses less digits than its factorization.

1123605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1123605 is about 1060.0023584879. The cubic root of 1123605 is about 103.9611849728.

Adding to 1123605 its reverse (5063211), we get a palindrome (6186816).

It can be divided in two parts, 1123 and 605, that added together give a cube (1728 = 12³).

The spelling of 1123605 in words is "one million, one hundred twenty-three thousand, six hundred five".