12724505 has 8 divisors (see below), whose sum is σ = 15557832. Its totient is φ = 9987328.

The previous prime is 12724501. The next prime is 12724519. The reversal of 12724505 is 50542721.

It can be written as a sum of positive squares in 4 ways, for example, as 808201 + 11916304 = 899^2 + 3452^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12724505 - 2² = 12724501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12724501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23744 + ... + 24273.

It is an arithmetic number, because the mean of its divisors is an integer number (1944729).

Almost surely, 2^12724505 is an apocalyptic number.

It is an amenable number.

12724505 is a deficient number, since it is larger than the sum of its proper divisors (2833327).

12724505 is an equidigital number, since it uses as much as digits as its factorization.

12724505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48075.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 12724505 is about 3567.1424137536. The cubic root of 12724505 is about 233.4606187606.

The spelling of 12724505 in words is "twelve million, seven hundred twenty-four thousand, five hundred five".