11712905 has 8 divisors (see below), whose sum is σ = 14435592. Its totient is φ = 9116928.

The previous prime is 11712901. The next prime is 11712929. The reversal of 11712905 is 50921711.

11712905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5442889 + 6270016 = 2333^2 + 2504^2 .

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 11712905 - 2² = 11712901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11712901) 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, 31472 + ... + 31841.

It is an arithmetic number, because the mean of its divisors is an integer number (1804449).

Almost surely, 2^11712905 is an apocalyptic number.

It is an amenable number.

11712905 is a deficient number, since it is larger than the sum of its proper divisors (2722687).

11712905 is an equidigital number, since it uses as much as digits as its factorization.

11712905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63355.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 11712905 is about 3422.4121610350. The cubic root of 11712905 is about 227.1023040198.

The spelling of 11712905 in words is "eleven million, seven hundred twelve thousand, nine hundred five".