1228657 has 2 divisors, whose sum is σ = 1228658. Its totient is φ = 1228656.

The previous prime is 1228651. The next prime is 1228679. The reversal of 1228657 is 7568221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 314721 = 956^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228657 - 2¹¹ = 1226609 is a prime.

It is a d-powerful number, because it can be written as 1 + 2¹⁷ + 2¹⁸ + 8⁴ + 6⁵ + 5² + 7⁷ .

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 614328 + 614329.

It is an arithmetic number, because the mean of its divisors is an integer number (614329).

2^1228657 is an apocalyptic number.

It is an amenable number.

1228657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228657 is an equidigital number, since it uses as much as digits as its factorization.

1228657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 1228657 is about 1108.4480141170. The cubic root of 1228657 is about 107.1051169513.

The spelling of 1228657 in words is "one million, two hundred twenty-eight thousand, six hundred fifty-seven".