1150221 has 8 divisors (see below), whose sum is σ = 1538784. Its totient is φ = 764240.

The previous prime is 1150217. The next prime is 1150229. The reversal of 1150221 is 1220511.

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 1150221 - 2² = 1150217 is a prime.

It is a Curzon number.

1150221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1150197 and 1150206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150229) 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, 991 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (192348).

2^1150221 is an apocalyptic number.

It is an amenable number.

1150221 is a deficient number, since it is larger than the sum of its proper divisors (388563).

1150221 is an equidigital number, since it uses as much as digits as its factorization.

1150221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1150221 is about 1072.4835663077. The cubic root of 1150221 is about 104.7756661740.

Adding to 1150221 its reverse (1220511), we get a palindrome (2370732).

The spelling of 1150221 in words is "one million, one hundred fifty thousand, two hundred twenty-one".