1272866 has 32 divisors (see below), whose sum is σ = 2350080. Its totient is φ = 505296.

The previous prime is 1272863. The next prime is 1272881. The reversal of 1272866 is 6682721.

1272866 = T₂₀ + T₂₁ + ... + T₁₉₆.

It is not an unprimeable number, because it can be changed into a prime (1272863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18965 + ... + 19031.

It is an arithmetic number, because the mean of its divisors is an integer number (73440).

2^1272866 is an apocalyptic number.

1272866 is a deficient number, since it is larger than the sum of its proper divisors (1077214).

1272866 is a wasteful number, since it uses less digits than its factorization.

1272866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158.

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

The square root of 1272866 is about 1128.2136322523. The cubic root of 1272866 is about 108.3746135910.

It can be divided in two parts, 12728 and 66, that multiplied together give a palindrome (840048).

The spelling of 1272866 in words is "one million, two hundred seventy-two thousand, eight hundred sixty-six".