65481 has 16 divisors (see below), whose sum is σ = 99456. Its totient is φ = 38016.

The previous prime is 65479. The next prime is 65497. The reversal of 65481 is 18456.

It is not a de Polignac number, because 65481 - 2¹ = 65479 is a prime.

It is a super-2 number, since 2×65481² = 8575522722, which contains 22 as substring.

65481 is a modest number, since divided by 481 gives 65 as remainder.

65481 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65481.

It is not an unprimeable number, because it can be changed into a prime (65381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861 + ... + 933.

It is an arithmetic number, because the mean of its divisors is an integer number (6216).

65481 is a Friedman number, since it can be written as 4^8-56+1, using all its digits and the basic arithmetic operations.

2⁶⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

65481 is a deficient number, since it is larger than the sum of its proper divisors (33975).

65481 is a wasteful number, since it uses less digits than its factorization.

65481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112.

The product of its digits is 960, while the sum is 24.

The square root of 65481 is about 255.8925555775. The cubic root of 65481 is about 40.3061918499.

The spelling of 65481 in words is "sixty-five thousand, four hundred eighty-one".