420485881 has 2 divisors, whose sum is σ = 420485882. Its totient is φ = 420485880.

The previous prime is 420485869. The next prime is 420485887. The reversal of 420485881 is 188584024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408686656 + 11799225 = 20216^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 420485881 - 2¹³ = 420477689 is a prime.

It is a super-2 number, since 2×420485881² = 353616752240692322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420485887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210242940 + 210242941.

It is an arithmetic number, because the mean of its divisors is an integer number (210242941).

Almost surely, 2^420485881 is an apocalyptic number.

It is an amenable number.

420485881 is a deficient number, since it is larger than the sum of its proper divisors (1).

420485881 is an equidigital number, since it uses as much as digits as its factorization.

420485881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 420485881 is about 20505.7523880496. The cubic root of 420485881 is about 749.1759132100.

The spelling of 420485881 in words is "four hundred twenty million, four hundred eighty-five thousand, eight hundred eighty-one".