1077221 has 2 divisors, whose sum is σ = 1077222. Its totient is φ = 1077220.

The previous prime is 1077203. The next prime is 1077227. The reversal of 1077221 is 1227701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 57121 = 1010^2 + 239^2 .

It is an emirp because it is prime and its reverse (1227701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1077221 is a prime.

It is a Chen prime.

It is equal to p₈₄₀₇₁ and since 1077221 and 84071 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1077193 and 1077202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1077227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538610 + 538611.

It is an arithmetic number, because the mean of its divisors is an integer number (538611).

2^1077221 is an apocalyptic number.

It is an amenable number.

1077221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1077221 is an equidigital number, since it uses as much as digits as its factorization.

1077221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 1077221 is about 1037.8925763296. The cubic root of 1077221 is about 102.5104807843.

The spelling of 1077221 in words is "one million, seventy-seven thousand, two hundred twenty-one".