1272686 has 4 divisors (see below), whose sum is σ = 1909032. Its totient is φ = 636342.

The previous prime is 1272679. The next prime is 1272749. The reversal of 1272686 is 6862721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6862721 = 421 ⋅16301.

It is a congruent number.

It is an unprimeable number.

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, 318170 + ... + 318173.

It is an arithmetic number, because the mean of its divisors is an integer number (477258).

2^1272686 is an apocalyptic number.

1272686 is a deficient number, since it is larger than the sum of its proper divisors (636346).

1272686 is an equidigital number, since it uses as much as digits as its factorization.

1272686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636345.

The product of its digits is 8064, while the sum is 32.

The square root of 1272686 is about 1128.1338573059. The cubic root of 1272686 is about 108.3695048181.

The spelling of 1272686 in words is "one million, two hundred seventy-two thousand, six hundred eighty-six".