1148066581 has 2 divisors, whose sum is σ = 1148066582. Its totient is φ = 1148066580.

The previous prime is 1148066567. The next prime is 1148066611. The reversal of 1148066581 is 1856608411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974064100 + 174002481 = 31210^2 + 13191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1148066581 - 2⁷ = 1148066453 is a prime.

It is a super-2 number, since 2×1148066581² = 2636113748818059122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1148066501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574033290 + 574033291.

It is an arithmetic number, because the mean of its divisors is an integer number (574033291).

Almost surely, 2^1148066581 is an apocalyptic number.

It is an amenable number.

1148066581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148066581 is an equidigital number, since it uses as much as digits as its factorization.

1148066581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1148066581 is about 33883.1312159901. The cubic root of 1148066581 is about 1047.1020867567.

The spelling of 1148066581 in words is "one billion, one hundred forty-eight million, sixty-six thousand, five hundred eighty-one".