1205245 has 4 divisors (see below), whose sum is σ = 1446300. Its totient is φ = 964192.

The previous prime is 1205231. The next prime is 1205251. The reversal of 1205245 is 5425021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 1036324 = 411^2 + 1018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205245 - 2⁷ = 1205117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120520 + ... + 120529.

It is an arithmetic number, because the mean of its divisors is an integer number (361575).

2^1205245 is an apocalyptic number.

It is an amenable number.

1205245 is a deficient number, since it is larger than the sum of its proper divisors (241055).

1205245 is an equidigital number, since it uses as much as digits as its factorization.

1205245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241054.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1205245 is about 1097.8365087753. The cubic root of 1205245 is about 106.4204553451.

The spelling of 1205245 in words is "one million, two hundred five thousand, two hundred forty-five".