1252718429 has 2 divisors, whose sum is σ = 1252718430. Its totient is φ = 1252718428.

The previous prime is 1252718377. The next prime is 1252718549. The reversal of 1252718429 is 9248172521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018567225 + 234151204 = 31915^2 + 15302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252718429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252714429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626359214 + 626359215.

It is an arithmetic number, because the mean of its divisors is an integer number (626359215).

Almost surely, 2^1252718429 is an apocalyptic number.

It is an amenable number.

1252718429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252718429 is an equidigital number, since it uses as much as digits as its factorization.

1252718429 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 1252718429 is about 35393.7625719561. The cubic root of 1252718429 is about 1077.9976699855.

The spelling of 1252718429 in words is "one billion, two hundred fifty-two million, seven hundred eighteen thousand, four hundred twenty-nine".