42127387 has 4 divisors (see below), whose sum is σ = 42143256. Its totient is φ = 42111520.

The previous prime is 42127381. The next prime is 42127433. The reversal of 42127387 is 78372124.

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 42127387 - 2⁷ = 42127259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42127381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2878 + ... + 9619.

It is an arithmetic number, because the mean of its divisors is an integer number (10535814).

Almost surely, 2^42127387 is an apocalyptic number.

42127387 is a deficient number, since it is larger than the sum of its proper divisors (15869).

42127387 is a wasteful number, since it uses less digits than its factorization.

42127387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15868.

The product of its digits is 18816, while the sum is 34.

The square root of 42127387 is about 6490.5613778779. The cubic root of 42127387 is about 347.9537388411.

The spelling of 42127387 in words is "forty-two million, one hundred twenty-seven thousand, three hundred eighty-seven".