1206559 has 4 divisors (see below), whose sum is σ = 1215504. Its totient is φ = 1197616.

The previous prime is 1206553. The next prime is 1206563. The reversal of 1206559 is 9556021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206559 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 (1206553) 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, 4267 + ... + 4540.

It is an arithmetic number, because the mean of its divisors is an integer number (303876).

2^1206559 is an apocalyptic number.

1206559 is a deficient number, since it is larger than the sum of its proper divisors (8945).

1206559 is an equidigital number, since it uses as much as digits as its factorization.

1206559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1206559 is about 1098.4347955159. The cubic root of 1206559 is about 106.4591157256.

The spelling of 1206559 in words is "one million, two hundred six thousand, five hundred fifty-nine".