1305630142181 has 2 divisors, whose sum is σ = 1305630142182. Its totient is φ = 1305630142180.

The previous prime is 1305630142049. The next prime is 1305630142231. The reversal of 1305630142181 is 1812410365031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1303800869281 + 1829272900 = 1141841^2 + 42770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305630142181 - 2¹⁰ = 1305630141157 is a prime.

It is a super-2 number, since 2×1305630142181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305630147181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652815071090 + 652815071091.

It is an arithmetic number, because the mean of its divisors is an integer number (652815071091).

Almost surely, 2^{1305630142181} is an apocalyptic number.

It is an amenable number.

1305630142181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305630142181 is an equidigital number, since it uses as much as digits as its factorization.

1305630142181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 1305630142181 in words is "one trillion, three hundred five billion, six hundred thirty million, one hundred forty-two thousand, one hundred eighty-one".