12723005 has 16 divisors (see below), whose sum is σ = 15864240. Its totient is φ = 9787392.

The previous prime is 12722993. The next prime is 12723017. The reversal of 12723005 is 50032721.

It is an interprime number because it is at equal distance from previous prime (12722993) and next prime (12723017).

It can be written as a sum of positive squares in 8 ways, for example, as 70756 + 12652249 = 266^2 + 3557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12723005 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17591 + ... + 18299.

It is an arithmetic number, because the mean of its divisors is an integer number (991515).

Almost surely, 2^12723005 is an apocalyptic number.

It is an amenable number.

12723005 is a deficient number, since it is larger than the sum of its proper divisors (3141235).

12723005 is an equidigital number, since it uses as much as digits as its factorization.

12723005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 12723005 is about 3566.9321552281. The cubic root of 12723005 is about 233.4514447380.

Adding to 12723005 its reverse (50032721), we get a palindrome (62755726).

It can be divided in two parts, 127 and 23005, that added together give a palindrome (23132).

The spelling of 12723005 in words is "twelve million, seven hundred twenty-three thousand, five".