1002530561 has 2 divisors, whose sum is σ = 1002530562. Its totient is φ = 1002530560.

The previous prime is 1002530531. The next prime is 1002530653. The reversal of 1002530561 is 1650352001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769785025 + 232745536 = 27745^2 + 15256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002530561 - 2¹⁸ = 1002268417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002530521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501265280 + 501265281.

It is an arithmetic number, because the mean of its divisors is an integer number (501265281).

Almost surely, 2^1002530561 is an apocalyptic number.

It is an amenable number.

1002530561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002530561 is an equidigital number, since it uses as much as digits as its factorization.

1002530561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1002530561 is about 31662.7630032504. The cubic root of 1002530561 is about 1000.8428098054.

Adding to 1002530561 its reverse (1650352001), we get a palindrome (2652882562).

The spelling of 1002530561 in words is "one billion, two million, five hundred thirty thousand, five hundred sixty-one".