1002081281 has 2 divisors, whose sum is σ = 1002081282. Its totient is φ = 1002081280.

The previous prime is 1002081259. The next prime is 1002081347. The reversal of 1002081281 is 1821802001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766182400 + 235898881 = 27680^2 + 15359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002081281 - 2⁶ = 1002081217 is a prime.

It is a super-2 number, since 2×1002081281² = 2008333787461201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1002081211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501040640 + 501040641.

It is an arithmetic number, because the mean of its divisors is an integer number (501040641).

Almost surely, 2^1002081281 is an apocalyptic number.

It is an amenable number.

1002081281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002081281 is an equidigital number, since it uses as much as digits as its factorization.

1002081281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1002081281 is about 31655.6674388647. The cubic root of 1002081281 is about 1000.6932795857.

Adding to 1002081281 its reverse (1821802001), we get a palindrome (2823883282).

The spelling of 1002081281 in words is "one billion, two million, eighty-one thousand, two hundred eighty-one".