65415 has 24 divisors (see below), whose sum is σ = 123120. Its totient is φ = 29568.

The previous prime is 65413. The next prime is 65419. The reversal of 65415 is 51456.

It is a happy number.

It is not a de Polignac number, because 65415 - 2¹ = 65413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 16.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 65391 and 65400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 691 + ... + 779.

It is an arithmetic number, because the mean of its divisors is an integer number (5130).

2⁶⁵⁴¹⁵ is an apocalyptic number.

65415 is a deficient number, since it is larger than the sum of its proper divisors (57705).

65415 is a wasteful number, since it uses less digits than its factorization.

65415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 104 counting only the distinct ones).

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

The square root of 65415 is about 255.7635626902. The cubic root of 65415 is about 40.2926454119.

The spelling of 65415 in words is "sixty-five thousand, four hundred fifteen".