1205089 has 2 divisors, whose sum is σ = 1205090. Its totient is φ = 1205088.

The previous prime is 1205081. The next prime is 1205093. The reversal of 1205089 is 9805021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 321489 = 940^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205089 - 2³ = 1205081 is a prime.

1205089 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1205081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602544 + 602545.

It is an arithmetic number, because the mean of its divisors is an integer number (602545).

2^1205089 is an apocalyptic number.

It is an amenable number.

1205089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205089 is an equidigital number, since it uses as much as digits as its factorization.

1205089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1205089 is about 1097.7654576457. The cubic root of 1205089 is about 106.4158636625.

The spelling of 1205089 in words is "one million, two hundred five thousand, eighty-nine".