1204855 has 8 divisors (see below), whose sum is σ = 1508832. Its totient is φ = 921888.

The previous prime is 1204823. The next prime is 1204859. The reversal of 1204855 is 5584021.

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

It is a cyclic number.

It is not a de Polignac number, because 1204855 - 2⁵ = 1204823 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204859) by changing a digit.

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, 5124 + ... + 5353.

It is an arithmetic number, because the mean of its divisors is an integer number (188604).

2^1204855 is an apocalyptic number.

1204855 is a deficient number, since it is larger than the sum of its proper divisors (303977).

1204855 is a wasteful number, since it uses less digits than its factorization.

1204855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1204855 is about 1097.6588723278. The cubic root of 1204855 is about 106.4089753956.

Adding to 1204855 its reverse (5584021), we get a palindrome (6788876).

The spelling of 1204855 in words is "one million, two hundred four thousand, eight hundred fifty-five".