1225489 has 4 divisors (see below), whose sum is σ = 1246320. Its totient is φ = 1204660.

The previous prime is 1225459. The next prime is 1225493. The reversal of 1225489 is 9845221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9845221 = 3049 ⋅3229.

It is a cyclic number.

It is not a de Polignac number, because 1225489 - 2⁷ = 1225361 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225489.

It is not an unprimeable number, because it can be changed into a prime (1225409) 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, 10327 + ... + 10444.

It is an arithmetic number, because the mean of its divisors is an integer number (311580).

2^1225489 is an apocalyptic number.

It is an amenable number.

1225489 is a deficient number, since it is larger than the sum of its proper divisors (20831).

1225489 is an equidigital number, since it uses as much as digits as its factorization.

1225489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20830.

The product of its digits is 5760, while the sum is 31.

The square root of 1225489 is about 1107.0180666999. The cubic root of 1225489 is about 107.0129835469.

The spelling of 1225489 in words is "one million, two hundred twenty-five thousand, four hundred eighty-nine".