1241485561 has 2 divisors, whose sum is σ = 1241485562. Its totient is φ = 1241485560.

The previous prime is 1241485501. The next prime is 1241485577. The reversal of 1241485561 is 1655841421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646125561 + 595360000 = 25419^2 + 24400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241485561 - 2¹⁷ = 1241354489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1241485561.

It is not a weakly prime, because it can be changed into another prime (1241485501) 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, 620742780 + 620742781.

It is an arithmetic number, because the mean of its divisors is an integer number (620742781).

Almost surely, 2^1241485561 is an apocalyptic number.

It is an amenable number.

1241485561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241485561 is an equidigital number, since it uses as much as digits as its factorization.

1241485561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 37.

The square root of 1241485561 is about 35234.7209581685. The cubic root of 1241485561 is about 1074.7659302165.

The spelling of 1241485561 in words is "one billion, two hundred forty-one million, four hundred eighty-five thousand, five hundred sixty-one".