1205205 has 8 divisors (see below), whose sum is σ = 1928352. Its totient is φ = 642768.

The previous prime is 1205179. The next prime is 1205219. The reversal of 1205205 is 5025021.

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

It is not a de Polignac number, because 1205205 - 2⁵ = 1205173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 80347 = 1205205 / (1 + 2 + 0 + 5 + 2 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40159 + ... + 40188.

It is an arithmetic number, because the mean of its divisors is an integer number (241044).

2^1205205 is an apocalyptic number.

1205205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205205 is a deficient number, since it is larger than the sum of its proper divisors (723147).

1205205 is an equidigital number, since it uses as much as digits as its factorization.

1205205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80355.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1205205 is about 1097.8182909753. The cubic root of 1205205 is about 106.4192780284.

The spelling of 1205205 in words is "one million, two hundred five thousand, two hundred five".