1125559 has 2 divisors, whose sum is σ = 1125560. Its totient is φ = 1125558.

The previous prime is 1125557. The next prime is 1125569. The reversal of 1125559 is 9555211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125559 - 2¹ = 1125557 is a prime.

Together with 1125557, it forms a pair of twin primes.

It is equal to p₈₇₅₆₂ and since 1125559 and 87562 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125557) 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 as a sum of consecutive naturals, namely, 562779 + 562780.

It is an arithmetic number, because the mean of its divisors is an integer number (562780).

2^1125559 is an apocalyptic number.

1125559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125559 is an equidigital number, since it uses as much as digits as its factorization.

1125559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 28.

The square root of 1125559 is about 1060.9236541806. The cubic root of 1125559 is about 104.0214144759.

It can be divided in two parts, 112 and 5559, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 1125559 in words is "one million, one hundred twenty-five thousand, five hundred fifty-nine".