1123513 has 4 divisors (see below), whose sum is σ = 1189620. Its totient is φ = 1057408.

The previous prime is 1123511. The next prime is 1123517. The reversal of 1123513 is 3153211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3153211 = 17 ⋅185483.

It can be written as a sum of positive squares in 2 ways, for example, as 558009 + 565504 = 747^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123513 - 2¹ = 1123511 is a prime.

It is a super-2 number, since 2×1123513² = 2524562922338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33028 + ... + 33061.

It is an arithmetic number, because the mean of its divisors is an integer number (297405).

2^1123513 is an apocalyptic number.

It is an amenable number.

1123513 is a deficient number, since it is larger than the sum of its proper divisors (66107).

1123513 is an equidigital number, since it uses as much as digits as its factorization.

1123513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66106.

The product of its digits is 90, while the sum is 16.

The square root of 1123513 is about 1059.9589614697. The cubic root of 1123513 is about 103.9583474721.

Adding to 1123513 its reverse (3153211), we get a palindrome (4276724).

The spelling of 1123513 in words is "one million, one hundred twenty-three thousand, five hundred thirteen".