1148561 has 2 divisors, whose sum is σ = 1148562. Its totient is φ = 1148560.

The previous prime is 1148549. The next prime is 1148593. The reversal of 1148561 is 1658411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 118336 = 1015^2 + 344^2 .

It is an emirp because it is prime and its reverse (1658411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1148561 - 2¹⁴ = 1132177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1148561.

It is not a weakly prime, because it can be changed into another prime (1148501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574280 + 574281.

It is an arithmetic number, because the mean of its divisors is an integer number (574281).

2^1148561 is an apocalyptic number.

It is an amenable number.

1148561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148561 is an equidigital number, since it uses as much as digits as its factorization.

1148561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 1148561 is about 1071.7093822488. The cubic root of 1148561 is about 104.7252377943.

The spelling of 1148561 in words is "one million, one hundred forty-eight thousand, five hundred sixty-one".