1230789 has 32 divisors (see below), whose sum is σ = 2027520. Its totient is φ = 649152.

The previous prime is 1230769. The next prime is 1230791. The reversal of 1230789 is 9870321.

It is a happy number.

It is not a de Polignac number, because 1230789 - 2¹¹ = 1228741 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230739) 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 31 ways as a sum of consecutive naturals, for example, 26164 + ... + 26210.

It is an arithmetic number, because the mean of its divisors is an integer number (63360).

2^1230789 is an apocalyptic number.

It is an amenable number.

1230789 is a deficient number, since it is larger than the sum of its proper divisors (796731).

1230789 is a wasteful number, since it uses less digits than its factorization.

1230789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1230789 is about 1109.4093022866. The cubic root of 1230789 is about 107.1670317514.

The spelling of 1230789 in words is "one million, two hundred thirty thousand, seven hundred eighty-nine".