1186221 has 4 divisors (see below), whose sum is σ = 1581632. Its totient is φ = 790812.

The previous prime is 1186217. The next prime is 1186231. The reversal of 1186221 is 1226811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1186221 - 2² = 1186217 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1186231) 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, 197701 + ... + 197706.

It is an arithmetic number, because the mean of its divisors is an integer number (395408).

2^1186221 is an apocalyptic number.

It is an amenable number.

1186221 is a deficient number, since it is larger than the sum of its proper divisors (395411).

1186221 is an equidigital number, since it uses as much as digits as its factorization.

1186221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395410.

The product of its digits is 192, while the sum is 21.

The square root of 1186221 is about 1089.1377323369. The cubic root of 1186221 is about 105.8575575744.

The spelling of 1186221 in words is "one million, one hundred eighty-six thousand, two hundred twenty-one".