481681 has 2 divisors, whose sum is σ = 481682. Its totient is φ = 481680.

The previous prime is 481673. The next prime is 481693. The reversal of 481681 is 186184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 140625 = 584^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 481681 - 2³ = 481673 is a prime.

It is a super-2 number, since 2×481681² = 464033171522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240840 + 240841.

It is an arithmetic number, because the mean of its divisors is an integer number (240841).

2⁴⁸¹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

481681 is a deficient number, since it is larger than the sum of its proper divisors (1).

481681 is an equidigital number, since it uses as much as digits as its factorization.

481681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 481681 is about 694.0324199920. The cubic root of 481681 is about 78.3886476170.

The spelling of 481681 in words is "four hundred eighty-one thousand, six hundred eighty-one".