1228518 has 24 divisors (see below), whose sum is σ = 2687256. Its totient is φ = 405600.

The previous prime is 1228501. The next prime is 1228519. The reversal of 1228518 is 8158221.

It is a junction number, because it is equal to n+sod(n) for n = 1228491 and 1228500.

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 11 ways as a sum of consecutive naturals, for example, 2098 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (111969).

2^1228518 is an apocalyptic number.

1228518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1228518 is an abundant number, since it is smaller than the sum of its proper divisors (1458738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228518 is a wasteful number, since it uses less digits than its factorization.

1228518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 657 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 1228518 is about 1108.3853120644. The cubic root of 1228518 is about 107.1010778059.

The spelling of 1228518 in words is "one million, two hundred twenty-eight thousand, five hundred eighteen".