4252356487721 has 2 divisors, whose sum is σ = 4252356487722. Its totient is φ = 4252356487720.

The previous prime is 4252356487679. The next prime is 4252356487837. The reversal of 4252356487721 is 1277846532524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3569360025625 + 682996462096 = 1889275^2 + 826436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4252356487721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4252356481721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2126178243860 + 2126178243861.

It is an arithmetic number, because the mean of its divisors is an integer number (2126178243861).

Almost surely, 2^{4252356487721} is an apocalyptic number.

It is an amenable number.

4252356487721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4252356487721 is an equidigital number, since it uses as much as digits as its factorization.

4252356487721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22579200, while the sum is 56.

The spelling of 4252356487721 in words is "four trillion, two hundred fifty-two billion, three hundred fifty-six million, four hundred eighty-seven thousand, seven hundred twenty-one".