642425001 has 16 divisors (see below), whose sum is σ = 866224896. Its totient is φ = 423472896.

The previous prime is 642424949. The next prime is 642425009. The reversal of 642425001 is 100524246.

It is not a de Polignac number, because 642425001 - 2¹¹ = 642422953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642425009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154911 + ... + 159003.

It is an arithmetic number, because the mean of its divisors is an integer number (54139056).

Almost surely, 2^642425001 is an apocalyptic number.

It is an amenable number.

642425001 is a deficient number, since it is larger than the sum of its proper divisors (223799895).

642425001 is a wasteful number, since it uses less digits than its factorization.

642425001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 642425001 is about 25346.1042568676. The cubic root of 642425001 is about 862.8609429857.

Adding to 642425001 its reverse (100524246), we get a palindrome (742949247).

The spelling of 642425001 in words is "six hundred forty-two million, four hundred twenty-five thousand, one".