1145140981 has 2 divisors, whose sum is σ = 1145140982. Its totient is φ = 1145140980.

The previous prime is 1145140967. The next prime is 1145140987. The reversal of 1145140981 is 1890415411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593360881 + 551780100 = 24359^2 + 23490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145140981 - 2¹⁷ = 1145009909 is a prime.

It is a super-2 number, since 2×1145140981² = 2622695732731284722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145140987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572570490 + 572570491.

It is an arithmetic number, because the mean of its divisors is an integer number (572570491).

Almost surely, 2^1145140981 is an apocalyptic number.

It is an amenable number.

1145140981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145140981 is an equidigital number, since it uses as much as digits as its factorization.

1145140981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 1145140981 is about 33839.9317522952. The cubic root of 1145140981 is about 1046.2118922489.

The spelling of 1145140981 in words is "one billion, one hundred forty-five million, one hundred forty thousand, nine hundred eighty-one".