621252145001 has 2 divisors, whose sum is σ = 621252145002. Its totient is φ = 621252145000.

The previous prime is 621252144959. The next prime is 621252145013. The reversal of 621252145001 is 100541252126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618936225625 + 2315919376 = 786725^2 + 48124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621252145001 is a prime.

It is not a weakly prime, because it can be changed into another prime (621252145051) 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, 310626072500 + 310626072501.

It is an arithmetic number, because the mean of its divisors is an integer number (310626072501).

Almost surely, 2^621252145001 is an apocalyptic number.

It is an amenable number.

621252145001 is a deficient number, since it is larger than the sum of its proper divisors (1).

621252145001 is an equidigital number, since it uses as much as digits as its factorization.

621252145001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 621252145001 its reverse (100541252126), we get a palindrome (721793397127).

The spelling of 621252145001 in words is "six hundred twenty-one billion, two hundred fifty-two million, one hundred forty-five thousand, one".