65420 has 12 divisors (see below), whose sum is σ = 137424. Its totient is φ = 26160.

The previous prime is 65419. The next prime is 65423. The reversal of 65420 is 2456.

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (65423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616 + ... + 1655.

It is an arithmetic number, because the mean of its divisors is an integer number (11452).

2⁶⁵⁴²⁰ is an apocalyptic number.

It is an amenable number.

65420 is an abundant number, since it is smaller than the sum of its proper divisors (72004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68712).

65420 is a wasteful number, since it uses less digits than its factorization.

65420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280 (or 3278 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 65420 is about 255.7733371562. The cubic root of 65420 is about 40.2936719761.

Adding to 65420 its reverse (2456), we get a palindrome (67876).

The spelling of 65420 in words is "sixty-five thousand, four hundred twenty".