65451 has 4 divisors (see below), whose sum is σ = 87272. Its totient is φ = 43632.

The previous prime is 65449. The next prime is 65479. The reversal of 65451 is 15456.

It is a happy number.

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

It is not a de Polignac number, because 65451 - 2¹ = 65449 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65451.

It is not an unprimeable number, because it can be changed into a prime (65551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10906 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (21818).

2⁶⁵⁴⁵¹ is an apocalyptic number.

65451 is a deficient number, since it is larger than the sum of its proper divisors (21821).

65451 is a wasteful number, since it uses less digits than its factorization.

65451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21820.

The product of its digits is 600, while the sum is 21.

The square root of 65451 is about 255.8339305096. The cubic root of 65451 is about 40.3000355070.

The spelling of 65451 in words is "sixty-five thousand, four hundred fifty-one".