1228397 has 2 divisors, whose sum is σ = 1228398. Its totient is φ = 1228396.

The previous prime is 1228393. The next prime is 1228399. The reversal of 1228397 is 7938221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 546121 = 826^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228397 - 2² = 1228393 is a prime.

Together with 1228399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228391) 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, 614198 + 614199.

It is an arithmetic number, because the mean of its divisors is an integer number (614199).

2^1228397 is an apocalyptic number.

It is an amenable number.

1228397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228397 is an equidigital number, since it uses as much as digits as its factorization.

1228397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 1228397 is about 1108.3307268140. The cubic root of 1228397 is about 107.0975614673.

The spelling of 1228397 in words is "one million, two hundred twenty-eight thousand, three hundred ninety-seven".