1228399 has 2 divisors, whose sum is σ = 1228400. Its totient is φ = 1228398.

The previous prime is 1228397. The next prime is 1228429. The reversal of 1228399 is 9938221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9938221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228399 - 2¹ = 1228397 is a prime.

Together with 1228397, it forms a pair of twin primes.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 614199 + 614200.

It is an arithmetic number, because the mean of its divisors is an integer number (614200).

2^1228399 is an apocalyptic number.

1228399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228399 is an equidigital number, since it uses as much as digits as its factorization.

1228399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 1228399 is about 1108.3316290714. The cubic root of 1228399 is about 107.0976195904.

The spelling of 1228399 in words is "one million, two hundred twenty-eight thousand, three hundred ninety-nine".