1128901 has 2 divisors, whose sum is σ = 1128902. Its totient is φ = 1128900.

The previous prime is 1128899. The next prime is 1128917. The reversal of 1128901 is 1098211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 15876 = 1055^2 + 126^2 .

It is an emirp because it is prime and its reverse (1098211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128901 - 2¹ = 1128899 is a prime.

Together with 1128899, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564450 + 564451.

It is an arithmetic number, because the mean of its divisors is an integer number (564451).

2^1128901 is an apocalyptic number.

It is an amenable number.

1128901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128901 is an equidigital number, since it uses as much as digits as its factorization.

1128901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1128901 is about 1062.4975294089. The cubic root of 1128901 is about 104.1242659077.

The spelling of 1128901 in words is "one million, one hundred twenty-eight thousand, nine hundred one".