1204789 has 4 divisors (see below), whose sum is σ = 1208556. Its totient is φ = 1201024.

The previous prime is 1204787. The next prime is 1204813. The reversal of 1204789 is 9874021.

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 864900 + 339889 = 930^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204789 - 2¹ = 1204787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1204789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354 + ... + 2059.

It is an arithmetic number, because the mean of its divisors is an integer number (302139).

2^1204789 is an apocalyptic number.

It is an amenable number.

1204789 is a deficient number, since it is larger than the sum of its proper divisors (3767).

1204789 is an equidigital number, since it uses as much as digits as its factorization.

1204789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1204789 is about 1097.6288079310. The cubic root of 1204789 is about 106.4070323899.

The spelling of 1204789 in words is "one million, two hundred four thousand, seven hundred eighty-nine".