65005420 has 24 divisors (see below), whose sum is σ = 137768400. Its totient is φ = 25762752.

The previous prime is 65005363. The next prime is 65005427. The reversal of 65005420 is 2450056.

It is a junction number, because it is equal to n+sod(n) for n = 65005391 and 65005400.

It is not an unprimeable number, because it can be changed into a prime (65005427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12730 + ... + 17089.

It is an arithmetic number, because the mean of its divisors is an integer number (5740350).

Almost surely, 2^65005420 is an apocalyptic number.

It is an amenable number.

65005420 is an abundant number, since it is smaller than the sum of its proper divisors (72762980).

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

65005420 is a wasteful number, since it uses less digits than its factorization.

65005420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29937 (or 29935 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 65005420 is about 8062.5938754225. The cubic root of 65005420 is about 402.0837511040.

Adding to 65005420 its reverse (2450056), we get a palindrome (67455476).

The spelling of 65005420 in words is "sixty-five million, five thousand, four hundred twenty".