12772805 has 4 divisors (see below), whose sum is σ = 15327372. Its totient is φ = 10218240.

The previous prime is 12772801. The next prime is 12772811. The reversal of 12772805 is 50827721.

12772805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3323329 + 9449476 = 1823^2 + 3074^2 .

It is not a de Polignac number, because 12772805 - 2² = 12772801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12772801) 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, 1277276 + ... + 1277285.

It is an arithmetic number, because the mean of its divisors is an integer number (3831843).

Almost surely, 2^12772805 is an apocalyptic number.

It is an amenable number.

12772805 is a deficient number, since it is larger than the sum of its proper divisors (2554567).

12772805 is an equidigital number, since it uses as much as digits as its factorization.

12772805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554566.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 12772805 is about 3573.9061263553. The cubic root of 12772805 is about 233.7556377147.

The spelling of 12772805 in words is "twelve million, seven hundred seventy-two thousand, eight hundred five".