1230389 has 4 divisors (see below), whose sum is σ = 1233024. Its totient is φ = 1227756.

The previous prime is 1230379. The next prime is 1230391. The reversal of 1230389 is 9830321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1230389 - 2⁴ = 1230373 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 (1230329) 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, 407 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (308256).

2^1230389 is an apocalyptic number.

It is an amenable number.

1230389 is a deficient number, since it is larger than the sum of its proper divisors (2635).

1230389 is an equidigital number, since it uses as much as digits as its factorization.

1230389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1230389 is about 1109.2290115211. The cubic root of 1230389 is about 107.1554209182.

The spelling of 1230389 in words is "one million, two hundred thirty thousand, three hundred eighty-nine".