1268605 has 16 divisors (see below), whose sum is σ = 1698480. Its totient is φ = 903168.

The previous prime is 1268599. The next prime is 1268621. The reversal of 1268605 is 5068621.

It can be written as a sum of positive squares in 8 ways, for example, as 142884 + 1125721 = 378^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268605 - 2⁹ = 1268093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (106155).

2^1268605 is an apocalyptic number.

It is an amenable number.

1268605 is a deficient number, since it is larger than the sum of its proper divisors (429875).

1268605 is a wasteful number, since it uses less digits than its factorization.

1268605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1268605 is about 1126.3236657373. The cubic root of 1268605 is about 108.2535480919.

The spelling of 1268605 in words is "one million, two hundred sixty-eight thousand, six hundred five".