1228658 has 8 divisors (see below), whose sum is σ = 1951452. Its totient is φ = 578176.

The previous prime is 1228657. The next prime is 1228679. The reversal of 1228658 is 8568221.

It can be written as a sum of positive squares in 2 ways, for example, as 1181569 + 47089 = 1087^2 + 217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228651) 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 3 ways as a sum of consecutive naturals, for example, 18035 + ... + 18102.

2^1228658 is an apocalyptic number.

1228658 is a deficient number, since it is larger than the sum of its proper divisors (722794).

1228658 is a wasteful number, since it uses less digits than its factorization.

1228658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36156.

The product of its digits is 7680, while the sum is 32.

The square root of 1228658 is about 1108.4484651981. The cubic root of 1228658 is about 107.1051460088.

The spelling of 1228658 in words is "one million, two hundred twenty-eight thousand, six hundred fifty-eight".