1128949 has 2 divisors, whose sum is σ = 1128950. Its totient is φ = 1128948.

The previous prime is 1128947. The next prime is 1128977. The reversal of 1128949 is 9498211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 286225 = 918^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128949 - 2¹ = 1128947 is a prime.

Together with 1128947, 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 (1128943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564474 + 564475.

It is an arithmetic number, because the mean of its divisors is an integer number (564475).

2^1128949 is an apocalyptic number.

It is an amenable number.

1128949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128949 is an equidigital number, since it uses as much as digits as its factorization.

1128949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 1128949 is about 1062.5201174566. The cubic root of 1128949 is about 104.1257416479.

The spelling of 1128949 in words is "one million, one hundred twenty-eight thousand, nine hundred forty-nine".