1221179 has 4 divisors (see below), whose sum is σ = 1235976. Its totient is φ = 1206384.

The previous prime is 1221167. The next prime is 1221193. The reversal of 1221179 is 9711221.

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 1221179 - 2⁴ = 1221163 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1221119) 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, 7274 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (308994).

2^1221179 is an apocalyptic number.

1221179 is a deficient number, since it is larger than the sum of its proper divisors (14797).

1221179 is an equidigital number, since it uses as much as digits as its factorization.

1221179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14796.

The product of its digits is 252, while the sum is 23.

The square root of 1221179 is about 1105.0696810609. The cubic root of 1221179 is about 106.8873826037.

The spelling of 1221179 in words is "one million, two hundred twenty-one thousand, one hundred seventy-nine".