1252359021671 has 2 divisors, whose sum is σ = 1252359021672. Its totient is φ = 1252359021670.

The previous prime is 1252359021643. The next prime is 1252359021703. The reversal of 1252359021671 is 1761209532521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252359021671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252359026671) 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, 626179510835 + 626179510836.

It is an arithmetic number, because the mean of its divisors is an integer number (626179510836).

Almost surely, 2^{1252359021671} is an apocalyptic number.

1252359021671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252359021671 is an equidigital number, since it uses as much as digits as its factorization.

1252359021671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 1252359021671 in words is "one trillion, two hundred fifty-two billion, three hundred fifty-nine million, twenty-one thousand, six hundred seventy-one".