1228861 has 2 divisors, whose sum is σ = 1228862. Its totient is φ = 1228860.

The previous prime is 1228849. The next prime is 1228883. The reversal of 1228861 is 1688221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 5625 = 1106^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228861 - 2¹³ = 1220669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614430 + 614431.

It is an arithmetic number, because the mean of its divisors is an integer number (614431).

2^1228861 is an apocalyptic number.

It is an amenable number.

1228861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228861 is an equidigital number, since it uses as much as digits as its factorization.

1228861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 28.

The square root of 1228861 is about 1108.5400308514. The cubic root of 1228861 is about 107.1110443540. Note that the first 3 decimals are identical.

The spelling of 1228861 in words is "one million, two hundred twenty-eight thousand, eight hundred sixty-one".