4128887 has 6 divisors (see below), whose sum is σ = 4803048. Its totient is φ = 3539004.

The previous prime is 4128877. The next prime is 4128889. The reversal of 4128887 is 7888214.

It is a happy number.

It is not a de Polignac number, because 4128887 - 2¹⁰ = 4127863 is a prime.

It is an Ulam number.

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 4128887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42083 + ... + 42180.

It is an arithmetic number, because the mean of its divisors is an integer number (800508).

Almost surely, 2^4128887 is an apocalyptic number.

4128887 is a deficient number, since it is larger than the sum of its proper divisors (674161).

4128887 is an equidigital number, since it uses as much as digits as its factorization.

4128887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84277 (or 84270 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 4128887 is about 2031.9662890904. The cubic root of 4128887 is about 160.4270751740.

The spelling of 4128887 in words is "four million, one hundred twenty-eight thousand, eight hundred eighty-seven".