27042643 has 4 divisors (see below), whose sum is σ = 28465960. Its totient is φ = 25619328.

The previous prime is 27042637. The next prime is 27042647. The reversal of 27042643 is 34624072.

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 27042643 - 2⁹ = 27042131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27042647) 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, 711630 + ... + 711667.

It is an arithmetic number, because the mean of its divisors is an integer number (7116490).

Almost surely, 2^27042643 is an apocalyptic number.

27042643 is a deficient number, since it is larger than the sum of its proper divisors (1423317).

27042643 is a wasteful number, since it uses less digits than its factorization.

27042643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423316.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 27042643 is about 5200.2541284056. The cubic root of 27042643 is about 300.1578539629.

The spelling of 27042643 in words is "twenty-seven million, forty-two thousand, six hundred forty-three".