1263232129 has 2 divisors, whose sum is σ = 1263232130. Its totient is φ = 1263232128.

The previous prime is 1263232121. The next prime is 1263232169. The reversal of 1263232129 is 9212323621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979377025 + 283855104 = 31295^2 + 16848^2 .

It is an emirp because it is prime and its reverse (9212323621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263232129 - 2³ = 1263232121 is a prime.

It is a super-3 number, since 3×1263232129³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263232129.

It is not a weakly prime, because it can be changed into another prime (1263232121) 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, 631616064 + 631616065.

It is an arithmetic number, because the mean of its divisors is an integer number (631616065).

Almost surely, 2^1263232129 is an apocalyptic number.

It is an amenable number.

1263232129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263232129 is an equidigital number, since it uses as much as digits as its factorization.

1263232129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 1263232129 is about 35541.9769990359. The cubic root of 1263232129 is about 1081.0050454983.

The spelling of 1263232129 in words is "one billion, two hundred sixty-three million, two hundred thirty-two thousand, one hundred twenty-nine".