1218959 has 4 divisors (see below), whose sum is σ = 1393104. Its totient is φ = 1044816.

The previous prime is 1218953. The next prime is 1218989. The reversal of 1218959 is 9598121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9598121 = 13 ⋅738317.

It is a cyclic number.

It is not a de Polignac number, because 1218959 - 2²⁰ = 170383 is a prime.

It is a super-2 number, since 2×1218959² = 2971722087362, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218953) 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, 87062 + ... + 87075.

It is an arithmetic number, because the mean of its divisors is an integer number (348276).

2^1218959 is an apocalyptic number.

1218959 is a deficient number, since it is larger than the sum of its proper divisors (174145).

1218959 is an equidigital number, since it uses as much as digits as its factorization.

1218959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174144.

The product of its digits is 6480, while the sum is 35.

The square root of 1218959 is about 1104.0647625932. The cubic root of 1218959 is about 106.8225725783.

The spelling of 1218959 in words is "one million, two hundred eighteen thousand, nine hundred fifty-nine".