1145138857 has 2 divisors, whose sum is σ = 1145138858. Its totient is φ = 1145138856.

The previous prime is 1145138833. The next prime is 1145138861. The reversal of 1145138857 is 7588315411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082475801 + 62663056 = 32901^2 + 7916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145138857 - 2¹¹ = 1145136809 is a prime.

It is a super-2 number, since 2×1145138857² = 2622686003622532898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145135857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572569428 + 572569429.

It is an arithmetic number, because the mean of its divisors is an integer number (572569429).

Almost surely, 2^1145138857 is an apocalyptic number.

It is an amenable number.

1145138857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145138857 is an equidigital number, since it uses as much as digits as its factorization.

1145138857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 43.

The square root of 1145138857 is about 33839.9003692387. The cubic root of 1145138857 is about 1046.2112454129.

The spelling of 1145138857 in words is "one billion, one hundred forty-five million, one hundred thirty-eight thousand, eight hundred fifty-seven".