1268979 has 16 divisors (see below), whose sum is σ = 1804032. Its totient is φ = 791648.

The previous prime is 1268963. The next prime is 1269001. The reversal of 1268979 is 9798621.

It is a cyclic number.

It is not a de Polignac number, because 1268979 - 2⁴ = 1268963 is a prime.

It is a super-2 number, since 2×1268979² = 3220615404882, which contains 22 as substring.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1268979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268929) 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 15 ways as a sum of consecutive naturals, for example, 3484 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (112752).

2^1268979 is an apocalyptic number.

1268979 is a deficient number, since it is larger than the sum of its proper divisors (535053).

1268979 is a wasteful number, since it uses less digits than its factorization.

1268979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 54432, while the sum is 42.

The square root of 1268979 is about 1126.4896803788. The cubic root of 1268979 is about 108.2641851956.

The spelling of 1268979 in words is "one million, two hundred sixty-eight thousand, nine hundred seventy-nine".