1205171225 has 12 divisors (see below), whose sum is σ = 1582319484. Its totient is φ = 907422720.

The previous prime is 1205171213. The next prime is 1205171237. The reversal of 1205171225 is 5221715021.

It is an interprime number because it is at equal distance from previous prime (1205171213) and next prime (1205171237).

It can be written as a sum of positive squares in 6 ways, for example, as 30327049 + 1174844176 = 5507^2 + 34276^2 .

It is not a de Polignac number, because 1205171225 - 2¹⁶ = 1205105689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1205171194 and 1205171203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1417424 + ... + 1418273.

It is an arithmetic number, because the mean of its divisors is an integer number (131859957).

Almost surely, 2^1205171225 is an apocalyptic number.

It is an amenable number.

1205171225 is a deficient number, since it is larger than the sum of its proper divisors (377148259).

1205171225 is a wasteful number, since it uses less digits than its factorization.

1205171225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835724 (or 2835719 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 1205171225 is about 34715.5761150524. The cubic root of 1205171225 is about 1064.1828391128.

Adding to 1205171225 its reverse (5221715021), we get a palindrome (6426886246).

The spelling of 1205171225 in words is "one billion, two hundred five million, one hundred seventy-one thousand, two hundred twenty-five".