1228979 has 4 divisors (see below), whose sum is σ = 1238784. Its totient is φ = 1219176.

The previous prime is 1228963. The next prime is 1228987. The reversal of 1228979 is 9798221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228979 - 2⁴ = 1228963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4712 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (309696).

2^1228979 is an apocalyptic number.

1228979 is a deficient number, since it is larger than the sum of its proper divisors (9805).

1228979 is an equidigital number, since it uses as much as digits as its factorization.

1228979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9804.

The product of its digits is 18144, while the sum is 38.

The square root of 1228979 is about 1108.5932527307. The cubic root of 1228979 is about 107.1144726503.

The spelling of 1228979 in words is "one million, two hundred twenty-eight thousand, nine hundred seventy-nine".