12823105 has 4 divisors (see below), whose sum is σ = 15387732. Its totient is φ = 10258480.

The previous prime is 12823099. The next prime is 12823123. The reversal of 12823105 is 50132821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50132821 = 137 ⋅365933.

It can be written as a sum of positive squares in 2 ways, for example, as 2944656 + 9878449 = 1716^2 + 3143^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12823105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282306 + ... + 1282315.

It is an arithmetic number, because the mean of its divisors is an integer number (3846933).

Almost surely, 2^12823105 is an apocalyptic number.

It is an amenable number.

12823105 is a deficient number, since it is larger than the sum of its proper divisors (2564627).

12823105 is an equidigital number, since it uses as much as digits as its factorization.

12823105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564626.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 12823105 is about 3580.9363300679. The cubic root of 12823105 is about 234.0620832665.

Adding to 12823105 its reverse (50132821), we get a palindrome (62955926).

The spelling of 12823105 in words is "twelve million, eight hundred twenty-three thousand, one hundred five".