1123965 has 12 divisors (see below), whose sum is σ = 1948284. Its totient is φ = 599424.

The previous prime is 1123961. The next prime is 1123973. The reversal of 1123965 is 5693211.

It can be written as a sum of positive squares in 2 ways, for example, as 161604 + 962361 = 402^2 + 981^2 .

It is not a de Polignac number, because 1123965 - 2² = 1123961 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123961) 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 11 ways as a sum of consecutive naturals, for example, 12444 + ... + 12533.

It is an arithmetic number, because the mean of its divisors is an integer number (162357).

2^1123965 is an apocalyptic number.

1123965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123965 is a deficient number, since it is larger than the sum of its proper divisors (824319).

1123965 is a wasteful number, since it uses less digits than its factorization.

1123965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24988 (or 24985 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1123965 is about 1060.1721558313. The cubic root of 1123965 is about 103.9722867480.

The spelling of 1123965 in words is "one million, one hundred twenty-three thousand, nine hundred sixty-five".