4127987 has 4 divisors (see below), whose sum is σ = 4180320. Its totient is φ = 4075656.

The previous prime is 4127983. The next prime is 4127989. The reversal of 4127987 is 7897214.

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 4127987 - 2² = 4127983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4127987.

It is not an unprimeable number, because it can be changed into a prime (4127983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26048 + ... + 26205.

It is an arithmetic number, because the mean of its divisors is an integer number (1045080).

Almost surely, 2^4127987 is an apocalyptic number.

4127987 is a deficient number, since it is larger than the sum of its proper divisors (52333).

4127987 is an equidigital number, since it uses as much as digits as its factorization.

4127987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52332.

The product of its digits is 28224, while the sum is 38.

The square root of 4127987 is about 2031.7448166539. The cubic root of 4127987 is about 160.4154178872.

The spelling of 4127987 in words is "four million, one hundred twenty-seven thousand, nine hundred eighty-seven".