642042006 has 32 divisors (see below), whose sum is σ = 1309962240. Its totient is φ = 209741376.

The previous prime is 642041999. The next prime is 642042017. The reversal of 642042006 is 600240246.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59995 + ... + 69881.

It is an arithmetic number, because the mean of its divisors is an integer number (40936320).

Almost surely, 2^642042006 is an apocalyptic number.

642042006 is an abundant number, since it is smaller than the sum of its proper divisors (667920234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642042006 is a wasteful number, since it uses less digits than its factorization.

642042006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10108.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 642042006 is about 25338.5478273716. The cubic root of 642042006 is about 862.6894380782.

The spelling of 642042006 in words is "six hundred forty-two million, forty-two thousand, six".