4128687 has 12 divisors (see below), whose sum is σ = 5988424. Its totient is φ = 2741040.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128687 is 7868214.

It is not a de Polignac number, because 4128687 - 2⁶ = 4128623 is a prime.

It is a Duffinian number.

4128687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1737 + ... + 3357.

Almost surely, 2^4128687 is an apocalyptic number.

4128687 is a deficient number, since it is larger than the sum of its proper divisors (1859737).

4128687 is a wasteful number, since it uses less digits than its factorization.

4128687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1907 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 4128687 is about 2031.9170750796. The cubic root of 4128687 is about 160.4244848123.

The spelling of 4128687 in words is "four million, one hundred twenty-eight thousand, six hundred eighty-seven".