42027971 has 4 divisors (see below), whose sum is σ = 43383744. Its totient is φ = 40672200.

The previous prime is 42027959. The next prime is 42027991. The reversal of 42027971 is 17972024.

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 42027971 - 2¹⁴ = 42011587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42027991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677840 + ... + 677901.

It is an arithmetic number, because the mean of its divisors is an integer number (10845936).

Almost surely, 2^42027971 is an apocalyptic number.

42027971 is a deficient number, since it is larger than the sum of its proper divisors (1355773).

42027971 is a wasteful number, since it uses less digits than its factorization.

42027971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355772.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 42027971 is about 6482.8983487326. The cubic root of 42027971 is about 347.6798123977.

Adding to 42027971 its reverse (17972024), we get a palindrome (59999995).

The spelling of 42027971 in words is "forty-two million, twenty-seven thousand, nine hundred seventy-one".