65420543 has 4 divisors (see below), whose sum is σ = 67016208. Its totient is φ = 63824880.

The previous prime is 65420527. The next prime is 65420567. The reversal of 65420543 is 34502456.

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

It is a cyclic number.

It is not a de Polignac number, because 65420543 - 2⁴ = 65420527 is a prime.

It is a Duffinian number.

It is a zygodrome in base 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797771 + ... + 797852.

It is an arithmetic number, because the mean of its divisors is an integer number (16754052).

Almost surely, 2^65420543 is an apocalyptic number.

65420543 is a deficient number, since it is larger than the sum of its proper divisors (1595665).

65420543 is a wasteful number, since it uses less digits than its factorization.

65420543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595664.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 65420543 is about 8088.2966686441. The cubic root of 65420543 is about 402.9378345782.

Adding to 65420543 its reverse (34502456), we get a palindrome (99922999).

The spelling of 65420543 in words is "sixty-five million, four hundred twenty thousand, five hundred forty-three".