1128397 has 2 divisors, whose sum is σ = 1128398. Its totient is φ = 1128396.

The previous prime is 1128383. The next prime is 1128427. The reversal of 1128397 is 7938211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022121 + 106276 = 1011^2 + 326^2 .

It is an emirp because it is prime and its reverse (7938211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128397 is a prime.

It is a Chen prime.

1128397 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564198 + 564199.

It is an arithmetic number, because the mean of its divisors is an integer number (564199).

2^1128397 is an apocalyptic number.

It is an amenable number.

1128397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128397 is an equidigital number, since it uses as much as digits as its factorization.

1128397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 1128397 is about 1062.2603259089. The cubic root of 1128397 is about 104.1087681089.

The spelling of 1128397 in words is "one million, one hundred twenty-eight thousand, three hundred ninety-seven".