642627 has 8 divisors (see below), whose sum is σ = 952080. Its totient is φ = 428400.

The previous prime is 642623. The next prime is 642673. The reversal of 642627 is 726246.

642627 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642627 - 2² = 642623 is a prime.

It is a super-2 number, since 2×642627² = 825938922258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 23801 = 642627 / (6 + 4 + 2 + 6 + 2 + 7).

It is an Ulam number.

It is a d-powerful number, because it can be written as 6³ + 4⁴ + 6³ + 2 + 2¹⁹ + 7⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 642627.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642627.

It is not an unprimeable number, because it can be changed into a prime (642623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11874 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (119010).

2⁶⁴²⁶²⁷ is an apocalyptic number.

642627 is a deficient number, since it is larger than the sum of its proper divisors (309453).

642627 is a wasteful number, since it uses less digits than its factorization.

642627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23810 (or 23804 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 642627 is about 801.6401936031. The cubic root of 642627 is about 86.2951370549.

The spelling of 642627 in words is "six hundred forty-two thousand, six hundred twenty-seven".