1203341561 has 2 divisors, whose sum is σ = 1203341562. Its totient is φ = 1203341560.

The previous prime is 1203341537. The next prime is 1203341567. The reversal of 1203341561 is 1651433021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1097663161 + 105678400 = 33131^2 + 10280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203341561 - 2¹⁴ = 1203325177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1203341561.

It is not a weakly prime, because it can be changed into another prime (1203341567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601670780 + 601670781.

It is an arithmetic number, because the mean of its divisors is an integer number (601670781).

Almost surely, 2^1203341561 is an apocalyptic number.

It is an amenable number.

1203341561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203341561 is an equidigital number, since it uses as much as digits as its factorization.

1203341561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1203341561 is about 34689.2139000007. The cubic root of 1203341561 is about 1063.6440268213.

Adding to 1203341561 its reverse (1651433021), we get a palindrome (2854774582).

The spelling of 1203341561 in words is "one billion, two hundred three million, three hundred forty-one thousand, five hundred sixty-one".