1219979 has 8 divisors (see below), whose sum is σ = 1263168. Its totient is φ = 1177600.

The previous prime is 1219963. The next prime is 1219991. The reversal of 1219979 is 9799121.

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 1219979 - 2⁴ = 1219963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4619 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (157896).

2^1219979 is an apocalyptic number.

1219979 is a deficient number, since it is larger than the sum of its proper divisors (43189).

1219979 is a wasteful number, since it uses less digits than its factorization.

1219979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its digits is 10206, while the sum is 38.

The square root of 1219979 is about 1104.5265954245. The cubic root of 1219979 is about 106.8523599205.

It can be divided in two parts, 12 and 19979, that added together give a palindrome (19991).

The spelling of 1219979 in words is "one million, two hundred nineteen thousand, nine hundred seventy-nine".