1228185 has 36 divisors (see below), whose sum is σ = 2480868. Its totient is φ = 560448.

The previous prime is 1228181. The next prime is 1228187. The reversal of 1228185 is 5818221.

It can be written as a sum of positive squares in 2 ways, for example, as 254016 + 974169 = 504^2 + 987^2 .

It is not a de Polignac number, because 1228185 - 2² = 1228181 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228181) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1927 + ... + 2483.

It is an arithmetic number, because the mean of its divisors is an integer number (68913).

2^1228185 is an apocalyptic number.

1228185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228185 is an abundant number, since it is smaller than the sum of its proper divisors (1252683).

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

1228185 is a wasteful number, since it uses less digits than its factorization.

1228185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 572 counting only the distinct ones).

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

The square root of 1228185 is about 1108.2350833645. The cubic root of 1228185 is about 107.0914000528.

The spelling of 1228185 in words is "one million, two hundred twenty-eight thousand, one hundred eighty-five".