65023421 has 4 divisors (see below), whose sum is σ = 66250332. Its totient is φ = 63796512.

The previous prime is 65023403. The next prime is 65023429. The reversal of 65023421 is 12432056.

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 17757796 + 47265625 = 4214^2 + 6875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65023421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65023429) 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, 613376 + ... + 613481.

It is an arithmetic number, because the mean of its divisors is an integer number (16562583).

Almost surely, 2^65023421 is an apocalyptic number.

It is an amenable number.

65023421 is a deficient number, since it is larger than the sum of its proper divisors (1226911).

65023421 is a wasteful number, since it uses less digits than its factorization.

65023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226910.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 65023421 is about 8063.7101262384. The cubic root of 65023421 is about 402.1208620691.

Adding to 65023421 its reverse (12432056), we get a palindrome (77455477).

The spelling of 65023421 in words is "sixty-five million, twenty-three thousand, four hundred twenty-one".