642425006 has 24 divisors (see below), whose sum is σ = 1034645304. Its totient is φ = 298924560.

The previous prime is 642424949. The next prime is 642425009. The reversal of 642425006 is 600524246.

It is a self number, because there is not a number n which added to its sum of digits gives 642425006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642425009) 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 11 ways as a sum of consecutive naturals, for example, 30941 + ... + 47351.

It is an arithmetic number, because the mean of its divisors is an integer number (43110221).

Almost surely, 2^642425006 is an apocalyptic number.

642425006 is a deficient number, since it is larger than the sum of its proper divisors (392220298).

642425006 is a wasteful number, since it uses less digits than its factorization.

642425006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16496 (or 16473 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 642425006 is about 25346.1043555021. The cubic root of 642425006 is about 862.8609452243.

The spelling of 642425006 in words is "six hundred forty-two million, four hundred twenty-five thousand, six".