420481 has 2 divisors, whose sum is σ = 420482. Its totient is φ = 420480.

The previous prime is 420479. The next prime is 420499. The reversal of 420481 is 184024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 128881 = 540^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 420481 - 2¹ = 420479 is a prime.

It is a super-2 number, since 2×420481² = 353608542722, which contains 22 as substring.

Together with 420479, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (420421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210240 + 210241.

It is an arithmetic number, because the mean of its divisors is an integer number (210241).

2⁴²⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

420481 is a deficient number, since it is larger than the sum of its proper divisors (1).

420481 is an equidigital number, since it uses as much as digits as its factorization.

420481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 420481 is about 648.4450632089. The cubic root of 420481 is about 74.9173014387.

The spelling of 420481 in words is "four hundred twenty thousand, four hundred eighty-one".