1311123 has 16 divisors (see below), whose sum is σ = 1938816. Its totient is φ = 781440.

The previous prime is 1311109. The next prime is 1311127. The reversal of 1311123 is 3211131.

It is not a de Polignac number, because 1311123 - 2⁹ = 1310611 is a prime.

It is a super-2 number, since 2×1311123² = 3438087042258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311099 and 1311108.

It is not an unprimeable number, because it can be changed into a prime (1311127) 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 15 ways as a sum of consecutive naturals, for example, 1915 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (121176).

2^1311123 is an apocalyptic number.

1311123 is a deficient number, since it is larger than the sum of its proper divisors (627693).

1311123 is a wasteful number, since it uses less digits than its factorization.

1311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its digits is 18, while the sum is 12.

The square root of 1311123 is about 1145.0427939601. The cubic root of 1311123 is about 109.4496755888.

Adding to 1311123 its reverse (3211131), we get a palindrome (4522254).

The spelling of 1311123 in words is "one million, three hundred eleven thousand, one hundred twenty-three".