1225189 has 8 divisors (see below), whose sum is σ = 1409408. Its totient is φ = 1043280.

The previous prime is 1225183. The next prime is 1225219. The reversal of 1225189 is 9815221.

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

It is not a de Polignac number, because 1225189 - 2⁵ = 1225157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225183) 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, 784 + ... + 1750.

It is an arithmetic number, because the mean of its divisors is an integer number (176176).

2^1225189 is an apocalyptic number.

It is an amenable number.

1225189 is a deficient number, since it is larger than the sum of its proper divisors (184219).

1225189 is an equidigital number, since it uses as much as digits as its factorization.

1225189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

The product of its digits is 1440, while the sum is 28.

The square root of 1225189 is about 1106.8825592627. The cubic root of 1225189 is about 107.0042505663.

The spelling of 1225189 in words is "one million, two hundred twenty-five thousand, one hundred eighty-nine".