1268305 has 4 divisors (see below), whose sum is σ = 1521972. Its totient is φ = 1014640.

The previous prime is 1268299. The next prime is 1268327. The reversal of 1268305 is 5038621.

It is a happy number.

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 576081 + 692224 = 759^2 + 832^2 .

It is not a de Polignac number, because 1268305 - 2⁷ = 1268177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1268305.

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, 126826 + ... + 126835.

It is an arithmetic number, because the mean of its divisors is an integer number (380493).

2^1268305 is an apocalyptic number.

It is an amenable number.

1268305 is a deficient number, since it is larger than the sum of its proper divisors (253667).

1268305 is an equidigital number, since it uses as much as digits as its factorization.

1268305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253666.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1268305 is about 1126.1904812242. The cubic root of 1268305 is about 108.2450141445.

The spelling of 1268305 in words is "one million, two hundred sixty-eight thousand, three hundred five".