1221219 has 12 divisors (see below), whose sum is σ = 1825200. Its totient is φ = 785904.

The previous prime is 1221197. The next prime is 1221221. The reversal of 1221219 is 9121221.

It is not a de Polignac number, because 1221219 - 2¹³ = 1213027 is a prime.

It is a super-2 number, since 2×1221219² = 2982751691922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221239) 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, 2079 + ... + 2600.

It is an arithmetic number, because the mean of its divisors is an integer number (152100).

2^1221219 is an apocalyptic number.

1221219 is a deficient number, since it is larger than the sum of its proper divisors (603981).

1221219 is a wasteful number, since it uses less digits than its factorization.

1221219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714 (or 4711 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1221219 is about 1105.0877793189. The cubic root of 1221219 is about 106.8885496312. Note that the first 3 decimals are identical.

The spelling of 1221219 in words is "one million, two hundred twenty-one thousand, two hundred nineteen".