455681 has 2 divisors, whose sum is σ = 455682. Its totient is φ = 455680.

The previous prime is 455659. The next prime is 455683. The reversal of 455681 is 186554.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 13456 = 665^2 + 116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455681 is a prime.

It is a super-2 number, since 2×455681² = 415290347522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 455683, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (455683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227840 + 227841.

It is an arithmetic number, because the mean of its divisors is an integer number (227841).

It is a Proth number, since it is equal to 445 ⋅ 2¹⁰ + 1 and 445 < 2¹⁰.

2⁴⁵⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

455681 is a deficient number, since it is larger than the sum of its proper divisors (1).

455681 is an equidigital number, since it uses as much as digits as its factorization.

455681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 455681 is about 675.0414802070. The cubic root of 455681 is about 76.9520700195.

The spelling of 455681 in words is "four hundred fifty-five thousand, six hundred eighty-one".