642007 has 4 divisors (see below), whose sum is σ = 645736. Its totient is φ = 638280.

The previous prime is 641981. The next prime is 642011. The reversal of 642007 is 700246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642007 - 2¹¹ = 639959 is a prime.

It is a d-powerful number, because it can be written as 6 + 4³ + 0 + 2¹⁹ + 0 + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642077) 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 3 ways as a sum of consecutive naturals, for example, 1593 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (161434).

2⁶⁴²⁰⁰⁷ is an apocalyptic number.

642007 is a deficient number, since it is larger than the sum of its proper divisors (3729).

642007 is a wasteful number, since it uses less digits than its factorization.

642007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 642007 is about 801.2533931285. The cubic root of 642007 is about 86.2673759013.

The spelling of 642007 in words is "six hundred forty-two thousand, seven".