65251 has 4 divisors (see below), whose sum is σ = 68112. Its totient is φ = 62392.

The previous prime is 65239. The next prime is 65257. The reversal of 65251 is 15256.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65251 - 2⁷ = 65123 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396 + ... + 1441.

It is an arithmetic number, because the mean of its divisors is an integer number (17028).

2⁶⁵²⁵¹ is an apocalyptic number.

65251 is a deficient number, since it is larger than the sum of its proper divisors (2861).

65251 is a wasteful number, since it uses less digits than its factorization.

65251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860.

The product of its digits is 300, while the sum is 19.

The square root of 65251 is about 255.4427528821. The cubic root of 65251 is about 40.2589450690.

It can be divided in two parts, 652 and 51, that added together give a triangular number (703 = T₃₇).

The spelling of 65251 in words is "sixty-five thousand, two hundred fifty-one".