8455681 has 8 divisors (see below), whose sum is σ = 9642024. Its totient is φ = 7345920.

The previous prime is 8455679. The next prime is 8455691. The reversal of 8455681 is 1865548.

It can be written as a sum of positive squares in 4 ways, for example, as 2772225 + 5683456 = 1665^2 + 2384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8455681 - 2¹ = 8455679 is a prime.

It is a super-2 number, since 2×8455681² = 142997082347522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8455681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8455621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18910 + ... + 19351.

It is an arithmetic number, because the mean of its divisors is an integer number (1205253).

Almost surely, 2^8455681 is an apocalyptic number.

It is an amenable number.

8455681 is a deficient number, since it is larger than the sum of its proper divisors (1186343).

8455681 is a wasteful number, since it uses less digits than its factorization.

8455681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38291.

The product of its digits is 38400, while the sum is 37.

The square root of 8455681 is about 2907.8653682727. The cubic root of 8455681 is about 203.7274410142.

The spelling of 8455681 in words is "eight million, four hundred fifty-five thousand, six hundred eighty-one".