420525255281 has 2 divisors, whose sum is σ = 420525255282. Its totient is φ = 420525255280.

The previous prime is 420525255277. The next prime is 420525255299. The reversal of 420525255281 is 182552525024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274559232256 + 145966023025 = 523984^2 + 382055^2 .

It is a cyclic number.

It is not a de Polignac number, because 420525255281 - 2² = 420525255277 is a prime.

It is a super-2 number, since 2×420525255281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420525251281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210262627640 + 210262627641.

It is an arithmetic number, because the mean of its divisors is an integer number (210262627641).

Almost surely, 2^420525255281 is an apocalyptic number.

It is an amenable number.

420525255281 is a deficient number, since it is larger than the sum of its proper divisors (1).

420525255281 is an equidigital number, since it uses as much as digits as its factorization.

420525255281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320000, while the sum is 41.

The spelling of 420525255281 in words is "four hundred twenty billion, five hundred twenty-five million, two hundred fifty-five thousand, two hundred eighty-one".