64481 has 4 divisors (see below), whose sum is σ = 68292. Its totient is φ = 60672.

The previous prime is 64453. The next prime is 64483. The reversal of 64481 is 18446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30625 + 33856 = 175^2 + 184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64481 is a prime.

It is a super-2 number, since 2×64481² = 8315598722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64481.

It is not an unprimeable number, because it can be changed into a prime (64483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (17073).

2⁶⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

64481 is a deficient number, since it is larger than the sum of its proper divisors (3811).

64481 is a wasteful number, since it uses less digits than its factorization.

64481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810.

The product of its digits is 768, while the sum is 23.

The square root of 64481 is about 253.9310930154. The cubic root of 64481 is about 40.0999583335.

It can be divided in two parts, 64 and 481, that added together give a palindrome (545).

The spelling of 64481 in words is "sixty-four thousand, four hundred eighty-one".