642241601 has 8 divisors (see below), whose sum is σ = 663412224. Its totient is φ = 621099360.

The previous prime is 642241583. The next prime is 642241603. The reversal of 642241601 is 106142246.

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 642241601 - 2²² = 638047297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642241603) 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 7 ways as a sum of consecutive naturals, for example, 45116 + ... + 57618.

It is an arithmetic number, because the mean of its divisors is an integer number (82926528).

Almost surely, 2^642241601 is an apocalyptic number.

It is an amenable number.

642241601 is a deficient number, since it is larger than the sum of its proper divisors (21170623).

642241601 is a wasteful number, since it uses less digits than its factorization.

642241601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14191.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 642241601 is about 25342.4860856231. The cubic root of 642241601 is about 862.7788250949.

Adding to 642241601 its reverse (106142246), we get a palindrome (748383847).

The spelling of 642241601 in words is "six hundred forty-two million, two hundred forty-one thousand, six hundred one".