65420500 has 24 divisors (see below), whose sum is σ = 142879464. Its totient is φ = 26168000.

The previous prime is 65420479. The next prime is 65420503. The reversal of 65420500 is 502456.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 50069776 = 3918^2 + 7076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65420503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64921 + ... + 65920.

It is an arithmetic number, because the mean of its divisors is an integer number (5953311).

Almost surely, 2^65420500 is an apocalyptic number.

It is an amenable number.

65420500 is an abundant number, since it is smaller than the sum of its proper divisors (77458964).

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

65420500 is a wasteful number, since it uses less digits than its factorization.

65420500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130860 (or 130848 counting only the distinct ones).

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

The square root of 65420500 is about 8088.2940104821. The cubic root of 65420500 is about 402.9377462964.

Adding to 65420500 its reverse (502456), we get a palindrome (65922956).

The spelling of 65420500 in words is "sixty-five million, four hundred twenty thousand, five hundred".