1204805 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 796992.

The previous prime is 1204787. The next prime is 1204813. The reversal of 1204805 is 5084021.

It is not a de Polignac number, because 1204805 - 2⁶ = 1204741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1204805 is an apocalyptic number.

It is an amenable number.

1204805 is a deficient number, since it is larger than the sum of its proper divisors (505915).

1204805 is a wasteful number, since it uses less digits than its factorization.

1204805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1204805 is about 1097.6360963452. The cubic root of 1204805 is about 106.4075034281.

Adding to 1204805 its reverse (5084021), we get a palindrome (6288826).

The spelling of 1204805 in words is "one million, two hundred four thousand, eight hundred five".