1230909 has 8 divisors (see below), whose sum is σ = 1656192. Its totient is φ = 813120.

The previous prime is 1230907. The next prime is 1230913. The reversal of 1230909 is 9090321.

It is a happy number.

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

It is not a de Polignac number, because 1230909 - 2¹ = 1230907 is a prime.

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

1230909 is a modest number, since divided by 909 gives 123 as remainder.

It is a Curzon number.

1230909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477 + ... + 2154.

It is an arithmetic number, because the mean of its divisors is an integer number (207024).

2^1230909 is an apocalyptic number.

It is an amenable number.

1230909 is a deficient number, since it is larger than the sum of its proper divisors (425283).

1230909 is a wasteful number, since it uses less digits than its factorization.

1230909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1230909 is about 1109.4633838032. The cubic root of 1230909 is about 107.1705145108.

The spelling of 1230909 in words is "one million, two hundred thirty thousand, nine hundred nine".