1228559 has 4 divisors (see below), whose sum is σ = 1293240. Its totient is φ = 1163880.

The previous prime is 1228547. The next prime is 1228567. The reversal of 1228559 is 9558221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1228559 - 2⁴ = 1228543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32312 + ... + 32349.

It is an arithmetic number, because the mean of its divisors is an integer number (323310).

2^1228559 is an apocalyptic number.

1228559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1228559 is a deficient number, since it is larger than the sum of its proper divisors (64681).

1228559 is an equidigital number, since it uses as much as digits as its factorization.

1228559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64680.

The product of its digits is 7200, while the sum is 32.

The square root of 1228559 is about 1108.4038072832. The cubic root of 1228559 is about 107.1022692402.

The spelling of 1228559 in words is "one million, two hundred twenty-eight thousand, five hundred fifty-nine".