1238005081 has 2 divisors, whose sum is σ = 1238005082. Its totient is φ = 1238005080.

The previous prime is 1238005073. The next prime is 1238005121. The reversal of 1238005081 is 1805008321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654541056 + 583464025 = 25584^2 + 24155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238005081 - 2³ = 1238005073 is a prime.

It is a super-2 number, since 2×1238005081² = 3065313161163633122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1238005001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619002540 + 619002541.

It is an arithmetic number, because the mean of its divisors is an integer number (619002541).

Almost surely, 2^1238005081 is an apocalyptic number.

It is an amenable number.

1238005081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238005081 is an equidigital number, since it uses as much as digits as its factorization.

1238005081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1238005081 is about 35185.2963750485. The cubic root of 1238005081 is about 1073.7606285689.

It can be divided in two parts, 123800 and 5081, that added together give a square (128881 = 359²).

The spelling of 1238005081 in words is "one billion, two hundred thirty-eight million, five thousand, eighty-one".