1262120129 has 2 divisors, whose sum is σ = 1262120130. Its totient is φ = 1262120128.

The previous prime is 1262120099. The next prime is 1262120149. The reversal of 1262120129 is 9210212621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1032658225 + 229461904 = 32135^2 + 15148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1262120129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1262120098 and 1262120107.

It is not a weakly prime, because it can be changed into another prime (1262120149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631060064 + 631060065.

It is an arithmetic number, because the mean of its divisors is an integer number (631060065).

Almost surely, 2^1262120129 is an apocalyptic number.

It is an amenable number.

1262120129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262120129 is an equidigital number, since it uses as much as digits as its factorization.

1262120129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1262120129 is about 35526.3300806599. The cubic root of 1262120129 is about 1080.6877560949.

The spelling of 1262120129 in words is "one billion, two hundred sixty-two million, one hundred twenty thousand, one hundred twenty-nine".