1128899 has 2 divisors, whose sum is σ = 1128900. Its totient is φ = 1128898.

The previous prime is 1128889. The next prime is 1128901. The reversal of 1128899 is 9988211.

It is a strong prime.

It is an emirp because it is prime and its reverse (9988211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128899 - 2⁸ = 1128643 is a prime.

It is a Sophie Germain prime.

Together with 1128901, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1128889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564449 + 564450.

It is an arithmetic number, because the mean of its divisors is an integer number (564450).

2^1128899 is an apocalyptic number.

1128899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128899 is an equidigital number, since it uses as much as digits as its factorization.

1128899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 1128899 is about 1062.4965882298. The cubic root of 1128899 is about 104.1242044176.

The spelling of 1128899 in words is "one million, one hundred twenty-eight thousand, eight hundred ninety-nine".