1229115761 has 2 divisors, whose sum is σ = 1229115762. Its totient is φ = 1229115760.

The previous prime is 1229115749. The next prime is 1229115773. The reversal of 1229115761 is 1675119221.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1229115749) and next prime (1229115773).

It can be written as a sum of positive squares in only one way, i.e., 1196122225 + 32993536 = 34585^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229115761 - 2²² = 1224921457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229115731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614557880 + 614557881.

It is an arithmetic number, because the mean of its divisors is an integer number (614557881).

Almost surely, 2^1229115761 is an apocalyptic number.

It is an amenable number.

1229115761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229115761 is an equidigital number, since it uses as much as digits as its factorization.

1229115761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 35.

The square root of 1229115761 is about 35058.7472822404. The cubic root of 1229115761 is about 1071.1844574207.

The spelling of 1229115761 in words is "one billion, two hundred twenty-nine million, one hundred fifteen thousand, seven hundred sixty-one".