1268686 has 4 divisors (see below), whose sum is σ = 1903032. Its totient is φ = 634342.

The previous prime is 1268681. The next prime is 1268713. The reversal of 1268686 is 6868621.

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

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317170 + ... + 317173.

It is an arithmetic number, because the mean of its divisors is an integer number (475758).

2^1268686 is an apocalyptic number.

1268686 is a deficient number, since it is larger than the sum of its proper divisors (634346).

1268686 is an equidigital number, since it uses as much as digits as its factorization.

1268686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634345.

The product of its digits is 27648, while the sum is 37.

The square root of 1268686 is about 1126.3596228559. The cubic root of 1268686 is about 108.2558520270.

The spelling of 1268686 in words is "one million, two hundred sixty-eight thousand, six hundred eighty-six".