1261132841 has 2 divisors, whose sum is σ = 1261132842. Its totient is φ = 1261132840.

The previous prime is 1261132781. The next prime is 1261132861. The reversal of 1261132841 is 1482311621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172377600 + 88755241 = 34240^2 + 9421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261132841 - 2¹⁸ = 1260870697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1261132861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630566420 + 630566421.

It is an arithmetic number, because the mean of its divisors is an integer number (630566421).

Almost surely, 2^1261132841 is an apocalyptic number.

It is an amenable number.

1261132841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261132841 is an equidigital number, since it uses as much as digits as its factorization.

1261132841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 1261132841 is about 35512.4322033848. The cubic root of 1261132841 is about 1080.4058948163.

The spelling of 1261132841 in words is "one billion, two hundred sixty-one million, one hundred thirty-two thousand, eight hundred forty-one".