1252835879509 has 2 divisors, whose sum is σ = 1252835879510. Its totient is φ = 1252835879508.

The previous prime is 1252835879507. The next prime is 1252835879563. The reversal of 1252835879509 is 9059785382521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1246076573284 + 6759306225 = 1116278^2 + 82215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252835879509 - 2¹ = 1252835879507 is a prime.

Together with 1252835879507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252835879507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626417939754 + 626417939755.

It is an arithmetic number, because the mean of its divisors is an integer number (626417939755).

Almost surely, 2^{1252835879509} is an apocalyptic number.

It is an amenable number.

1252835879509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252835879509 is an equidigital number, since it uses as much as digits as its factorization.

1252835879509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432000, while the sum is 64.

The spelling of 1252835879509 in words is "one trillion, two hundred fifty-two billion, eight hundred thirty-five million, eight hundred seventy-nine thousand, five hundred nine".