1095221 has 2 divisors, whose sum is σ = 1095222. Its totient is φ = 1095220.

The previous prime is 1095209. The next prime is 1095223. The reversal of 1095221 is 1225901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 192721 = 950^2 + 439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1095221 is a prime.

Together with 1095223, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1095193 and 1095202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1095223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547610 + 547611.

It is an arithmetic number, because the mean of its divisors is an integer number (547611).

2^1095221 is an apocalyptic number.

It is an amenable number.

1095221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1095221 is an equidigital number, since it uses as much as digits as its factorization.

1095221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1095221 is about 1046.5280693799. The cubic root of 1095221 is about 103.0783015992.

The spelling of 1095221 in words is "one million, ninety-five thousand, two hundred twenty-one".