4281857804621 has 2 divisors, whose sum is σ = 4281857804622. Its totient is φ = 4281857804620.

The previous prime is 4281857804617. The next prime is 4281857804633. The reversal of 4281857804621 is 1264087581824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4267484192521 + 14373612100 = 2065789^2 + 119890^2 .

It is a cyclic number.

It is not a de Polignac number, because 4281857804621 - 2² = 4281857804617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4281857804321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2140928902310 + 2140928902311.

It is an arithmetic number, because the mean of its divisors is an integer number (2140928902311).

Almost surely, 2^{4281857804621} is an apocalyptic number.

It is an amenable number.

4281857804621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4281857804621 is an equidigital number, since it uses as much as digits as its factorization.

4281857804621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6881280, while the sum is 56.

The spelling of 4281857804621 in words is "four trillion, two hundred eighty-one billion, eight hundred fifty-seven million, eight hundred four thousand, six hundred twenty-one".