1205270089 has 9 divisors (see below), whose sum is σ = 1218643573. Its totient is φ = 1192042912.

The previous prime is 1205270023. The next prime is 1205270093. The reversal of 1205270089 is 9800725021.

The square root of 1205270089 is 34717.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 564775225 + 640494864 = 23765^2 + 25308^2 .

It is not a de Polignac number, because 1205270089 - 2⁹ = 1205269577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205270009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5172717 + ... + 5172949.

Almost surely, 2^1205270089 is an apocalyptic number.

1205270089 is the 34717-th square number.

1205270089 is the 17359-th centered octagonal number.

It is an amenable number.

1205270089 is a deficient number, since it is larger than the sum of its proper divisors (13373484).

1205270089 is an frugal number, since it uses more digits than its factorization.

1205270089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The cubic root of 1205270089 is about 1064.2119377431.

The spelling of 1205270089 in words is "one billion, two hundred five million, two hundred seventy thousand, eighty-nine".