65425321 has 4 divisors (see below), whose sum is σ = 70458052. Its totient is φ = 60392592.

The previous prime is 65425307. The next prime is 65425337. The reversal of 65425321 is 12352456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 45968400 = 4411^2 + 6780^2 .

It is not a de Polignac number, because 65425321 - 2⁵ = 65425289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65425321.

It is not an unprimeable number, because it can be changed into a prime (65425021) 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, 2516346 + ... + 2516371.

It is an arithmetic number, because the mean of its divisors is an integer number (17614513).

Almost surely, 2^65425321 is an apocalyptic number.

It is an amenable number.

65425321 is a deficient number, since it is larger than the sum of its proper divisors (5032731).

65425321 is a wasteful number, since it uses less digits than its factorization.

65425321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032730.

The product of its digits is 7200, while the sum is 28.

The square root of 65425321 is about 8088.5920282828. The cubic root of 65425321 is about 402.9476438828.

Adding to 65425321 its reverse (12352456), we get a palindrome (77777777).

The spelling of 65425321 in words is "sixty-five million, four hundred twenty-five thousand, three hundred twenty-one".