1205285 has 8 divisors (see below), whose sum is σ = 1455000. Its totient is φ = 958464.

The previous prime is 1205257. The next prime is 1205287. The reversal of 1205285 is 5825021.

It can be written as a sum of positive squares in 4 ways, for example, as 23716 + 1181569 = 154^2 + 1087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205285 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (181875).

2^1205285 is an apocalyptic number.

It is an amenable number.

1205285 is a deficient number, since it is larger than the sum of its proper divisors (249715).

1205285 is a wasteful number, since it uses less digits than its factorization.

1205285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1205285 is about 1097.8547262730. The cubic root of 1205285 is about 106.4216326358.

The spelling of 1205285 in words is "one million, two hundred five thousand, two hundred eighty-five".