1302040561 has 2 divisors, whose sum is σ = 1302040562. Its totient is φ = 1302040560.

The previous prime is 1302040501. The next prime is 1302040631. The reversal of 1302040561 is 1650402031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678289936 + 623750625 = 26044^2 + 24975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302040561 - 2⁷ = 1302040433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1302040501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651020280 + 651020281.

It is an arithmetic number, because the mean of its divisors is an integer number (651020281).

Almost surely, 2^1302040561 is an apocalyptic number.

It is an amenable number.

1302040561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302040561 is an equidigital number, since it uses as much as digits as its factorization.

1302040561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1302040561 is about 36083.7991486484. The cubic root of 1302040561 is about 1091.9636239655.

Adding to 1302040561 its reverse (1650402031), we get a palindrome (2952442592).

The spelling of 1302040561 in words is "one billion, three hundred two million, forty thousand, five hundred sixty-one".