64542043 has 4 divisors (see below), whose sum is σ = 64630120. Its totient is φ = 64453968.

The previous prime is 64542029. The next prime is 64542059. The reversal of 64542043 is 34024546.

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 64542043 - 2²¹ = 62444891 is a prime.

It is a super-2 number, since 2×64542043² = 8331350629227698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64542073) 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, 42930 + ... + 44407.

It is an arithmetic number, because the mean of its divisors is an integer number (16157530).

Almost surely, 2^64542043 is an apocalyptic number.

64542043 is a deficient number, since it is larger than the sum of its proper divisors (88077).

64542043 is an equidigital number, since it uses as much as digits as its factorization.

64542043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88076.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 64542043 is about 8033.8062585552. The cubic root of 64542043 is about 401.1260831171.

Adding to 64542043 its reverse (34024546), we get a palindrome (98566589).

The spelling of 64542043 in words is "sixty-four million, five hundred forty-two thousand, forty-three".