1148989 has 2 divisors, whose sum is σ = 1148990. Its totient is φ = 1148988.

The previous prime is 1148981. The next prime is 1148999. The reversal of 1148989 is 9898411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 284089 = 930^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1148989 - 2³ = 1148981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1148981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574494 + 574495.

It is an arithmetic number, because the mean of its divisors is an integer number (574495).

2^1148989 is an apocalyptic number.

It is an amenable number.

1148989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148989 is an equidigital number, since it uses as much as digits as its factorization.

1148989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The square root of 1148989 is about 1071.9090446488. The cubic root of 1148989 is about 104.7382444567.

The spelling of 1148989 in words is "one million, one hundred forty-eight thousand, nine hundred eighty-nine".