1280979 has 12 divisors (see below), whose sum is σ = 2114736. Its totient is φ = 731952.

The previous prime is 1280969. The next prime is 1280987. The reversal of 1280979 is 9790821.

It is a happy number.

It is not a de Polignac number, because 1280979 - 2⁵ = 1280947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1280969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10104 + ... + 10229.

It is an arithmetic number, because the mean of its divisors is an integer number (176228).

2^1280979 is an apocalyptic number.

1280979 is a deficient number, since it is larger than the sum of its proper divisors (833757).

1280979 is a wasteful number, since it uses less digits than its factorization.

1280979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20346 (or 20343 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1280979 is about 1131.8034281623. The cubic root of 1280979 is about 108.6043790141.

The spelling of 1280979 in words is "one million, two hundred eighty thousand, nine hundred seventy-nine".