64751 has 4 divisors (see below), whose sum is σ = 65712. Its totient is φ = 63792.

The previous prime is 64747. The next prime is 64763. The reversal of 64751 is 15746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15746 = 2 ⋅7873.

It is a cyclic number.

It is not a de Polignac number, because 64751 - 2² = 64747 is a prime.

It is a Duffinian number.

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 64751.

It is not an unprimeable number, because it can be changed into a prime (64781) 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, 371 + ... + 516.

It is an arithmetic number, because the mean of its divisors is an integer number (16428).

2⁶⁴⁷⁵¹ is an apocalyptic number.

64751 is a deficient number, since it is larger than the sum of its proper divisors (961).

64751 is an equidigital number, since it uses as much as digits as its factorization.

64751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960.

The product of its digits is 840, while the sum is 23.

The square root of 64751 is about 254.4621779361. The cubic root of 64751 is about 40.1558503117.

The spelling of 64751 in words is "sixty-four thousand, seven hundred fifty-one".