642380001 has 8 divisors (see below), whose sum is σ = 859297824. Its totient is φ = 426857760.

The previous prime is 642379999. The next prime is 642380009. The reversal of 642380001 is 100083246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642380001 - 2¹ = 642379999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642380009) 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, 347820 + ... + 349661.

It is an arithmetic number, because the mean of its divisors is an integer number (107412228).

Almost surely, 2^642380001 is an apocalyptic number.

It is an amenable number.

642380001 is a deficient number, since it is larger than the sum of its proper divisors (216917823).

642380001 is a wasteful number, since it uses less digits than its factorization.

642380001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697791.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 642380001 is about 25345.2165309354. The cubic root of 642380001 is about 862.8407955501.

The spelling of 642380001 in words is "six hundred forty-two million, three hundred eighty thousand, one".