642027 has 4 divisors (see below), whose sum is σ = 856040. Its totient is φ = 428016.

The previous prime is 642013. The next prime is 642049. The reversal of 642027 is 720246.

It is a happy number.

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

It is not a de Polignac number, because 642027 - 2⁴ = 642011 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641994 and 642012.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642027.

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, 107002 + ... + 107007.

It is an arithmetic number, because the mean of its divisors is an integer number (214010).

2⁶⁴²⁰²⁷ is an apocalyptic number.

642027 is a deficient number, since it is larger than the sum of its proper divisors (214013).

642027 is a wasteful number, since it uses less digits than its factorization.

642027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214012.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 642027 is about 801.2658734777. The cubic root of 642027 is about 86.2682717013.

The spelling of 642027 in words is "six hundred forty-two thousand, twenty-seven".