1159221 has 8 divisors (see below), whose sum is σ = 1766464. Its totient is φ = 662400.

The previous prime is 1159201. The next prime is 1159229. The reversal of 1159221 is 1229511.

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

It is not a de Polignac number, because 1159221 - 2⁵ = 1159189 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: 55201 = 1159221 / (1 + 1 + 5 + 9 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159229) 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, 27580 + ... + 27621.

It is an arithmetic number, because the mean of its divisors is an integer number (220808).

2^1159221 is an apocalyptic number.

It is an amenable number.

1159221 is a deficient number, since it is larger than the sum of its proper divisors (607243).

1159221 is an equidigital number, since it uses as much as digits as its factorization.

1159221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55211.

The product of its digits is 180, while the sum is 21.

The square root of 1159221 is about 1076.6712590201. The cubic root of 1159221 is about 105.0482318096.

The spelling of 1159221 in words is "one million, one hundred fifty-nine thousand, two hundred twenty-one".