65307421 has 8 divisors (see below), whose sum is σ = 71380224. Its totient is φ = 59482560.

The previous prime is 65307413. The next prime is 65307443. The reversal of 65307421 is 12470356.

65307421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65307421 - 2³ = 65307413 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 65307421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65307401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61435 + ... + 62488.

It is an arithmetic number, because the mean of its divisors is an integer number (8922528).

Almost surely, 2^65307421 is an apocalyptic number.

It is an amenable number.

65307421 is a deficient number, since it is larger than the sum of its proper divisors (6072803).

65307421 is a wasteful number, since it uses less digits than its factorization.

65307421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123971.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 65307421 is about 8081.3006997636. The cubic root of 65307421 is about 402.7054537942.

Adding to 65307421 its reverse (12470356), we get a palindrome (77777777).

The spelling of 65307421 in words is "sixty-five million, three hundred seven thousand, four hundred twenty-one".