1220079 has 8 divisors (see below), whose sum is σ = 1859200. Its totient is φ = 697176.

The previous prime is 1220077. The next prime is 1220099. The reversal of 1220079 is 9700221.

It is a happy number.

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

It is not a de Polignac number, because 1220079 - 2¹ = 1220077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 58099 = 1220079 / (1 + 2 + 2 + 0 + 0 + 7 + 9).

1220079 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29029 + ... + 29070.

It is an arithmetic number, because the mean of its divisors is an integer number (232400).

2^1220079 is an apocalyptic number.

1220079 is a deficient number, since it is larger than the sum of its proper divisors (639121).

1220079 is an equidigital number, since it uses as much as digits as its factorization.

1220079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58109.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1220079 is about 1104.5718627595. The cubic root of 1220079 is about 106.8552793544.

The spelling of 1220079 in words is "one million, two hundred twenty thousand, seventy-nine".