64242643 has 8 divisors (see below), whose sum is σ = 68094000. Its totient is φ = 60399360.

The previous prime is 64242637. The next prime is 64242649. The reversal of 64242643 is 34624246.

It is an interprime number because it is at equal distance from previous prime (64242637) and next prime (64242649).

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 64242643 - 2⁹ = 64242131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64242649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24223 + ... + 26743.

It is an arithmetic number, because the mean of its divisors is an integer number (8511750).

Almost surely, 2^64242643 is an apocalyptic number.

64242643 is a deficient number, since it is larger than the sum of its proper divisors (3851357).

64242643 is a wasteful number, since it uses less digits than its factorization.

64242643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037.

The product of its digits is 27648, while the sum is 31.

The square root of 64242643 is about 8015.1508407515. The cubic root of 64242643 is about 400.5048687508.

Adding to 64242643 its reverse (34624246), we get a palindrome (98866889).

The spelling of 64242643 in words is "sixty-four million, two hundred forty-two thousand, six hundred forty-three".