1230189 has 4 divisors (see below), whose sum is σ = 1640256. Its totient is φ = 820124.

The previous prime is 1230181. The next prime is 1230199. The reversal of 1230189 is 9810321.

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 1230189 - 2³ = 1230181 is a prime.

It is a D-number.

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

1230189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230181) 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 3 ways as a sum of consecutive naturals, for example, 205029 + ... + 205034.

It is an arithmetic number, because the mean of its divisors is an integer number (410064).

2^1230189 is an apocalyptic number.

It is an amenable number.

1230189 is a deficient number, since it is larger than the sum of its proper divisors (410067).

1230189 is an equidigital number, since it uses as much as digits as its factorization.

1230189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410066.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1230189 is about 1109.1388551484. The cubic root of 1230189 is about 107.1496145579.

The spelling of 1230189 in words is "one million, two hundred thirty thousand, one hundred eighty-nine".