1266879 has 8 divisors (see below), whose sum is σ = 1699632. Its totient is φ = 839360.

The previous prime is 1266869. The next prime is 1266883. The reversal of 1266879 is 9786621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266879 - 2⁵ = 1266847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266869) 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 in 7 ways as a sum of consecutive naturals, for example, 702 + ... + 1739.

It is an arithmetic number, because the mean of its divisors is an integer number (212454).

2^1266879 is an apocalyptic number.

1266879 is a deficient number, since it is larger than the sum of its proper divisors (432753).

1266879 is a wasteful number, since it uses less digits than its factorization.

1266879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617.

The product of its digits is 36288, while the sum is 39.

The square root of 1266879 is about 1125.5571953482. The cubic root of 1266879 is about 108.2044310366.

It can be divided in two parts, 1266 and 879, that added together give a triangular number (2145 = T₆₅).

The spelling of 1266879 in words is "one million, two hundred sixty-six thousand, eight hundred seventy-nine".