2851247129 has 2 divisors, whose sum is σ = 2851247130. Its totient is φ = 2851247128.

The previous prime is 2851247117. The next prime is 2851247131. The reversal of 2851247129 is 9217421582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2465321104 + 385926025 = 49652^2 + 19645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2851247129 is a prime.

It is a super-2 number, since 2×2851247129² = 16259220381261485282, which contains 22 as substring.

Together with 2851247131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2851247159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425623564 + 1425623565.

It is an arithmetic number, because the mean of its divisors is an integer number (1425623565).

Almost surely, 2^2851247129 is an apocalyptic number.

It is an amenable number.

2851247129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851247129 is an equidigital number, since it uses as much as digits as its factorization.

2851247129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The square root of 2851247129 is about 53397.0704158945. The cubic root of 2851247129 is about 1418.0067134704.

The spelling of 2851247129 in words is "two billion, eight hundred fifty-one million, two hundred forty-seven thousand, one hundred twenty-nine".