52643421 has 6 divisors (see below), whose sum is σ = 76040510. Its totient is φ = 35095608.

The previous prime is 52643369. The next prime is 52643449. The reversal of 52643421 is 12434625.

52643421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 7080921 = 6750^2 + 2661^2 .

It is not a de Polignac number, because 52643421 - 2²¹ = 50546269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52643491) 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 5 ways as a sum of consecutive naturals, for example, 2924626 + ... + 2924643.

Almost surely, 2^52643421 is an apocalyptic number.

It is an amenable number.

52643421 is a deficient number, since it is larger than the sum of its proper divisors (23397089).

52643421 is a wasteful number, since it uses less digits than its factorization.

52643421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849275 (or 5849272 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 52643421 is about 7255.5786123506. The cubic root of 52643421 is about 374.7842812649.

The spelling of 52643421 in words is "fifty-two million, six hundred forty-three thousand, four hundred twenty-one".