642026001 has 8 divisors (see below), whose sum is σ = 864035424. Its totient is φ = 424016960.

The previous prime is 642025997. The next prime is 642026039. The reversal of 642026001 is 100620246.

It is a happy number.

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 642026001 - 2² = 642025997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642026051) 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, 999720 + ... + 1000361.

It is an arithmetic number, because the mean of its divisors is an integer number (108004428).

Almost surely, 2^642026001 is an apocalyptic number.

It is an amenable number.

642026001 is a deficient number, since it is larger than the sum of its proper divisors (222009423).

642026001 is a wasteful number, since it uses less digits than its factorization.

642026001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000191.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 642026001 is about 25338.2320022530. The cubic root of 642026001 is about 862.6822695653.

Adding to 642026001 its reverse (100620246), we get a palindrome (742646247).

The spelling of 642026001 in words is "six hundred forty-two million, twenty-six thousand, one".