1230509 has 8 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 1026000.

The previous prime is 1230491. The next prime is 1230521. The reversal of 1230509 is 9050321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230509 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230529) 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, 2117 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (180576).

2^1230509 is an apocalyptic number.

It is an amenable number.

1230509 is a deficient number, since it is larger than the sum of its proper divisors (214099).

1230509 is an equidigital number, since it uses as much as digits as its factorization.

1230509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1230509 is about 1109.2831018275. The cubic root of 1230509 is about 107.1589044324.

The spelling of 1230509 in words is "one million, two hundred thirty thousand, five hundred nine".