4128685 has 16 divisors (see below), whose sum is σ = 5444352. Its totient is φ = 2980800.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128685 is 5868214.

It is not a de Polignac number, because 4128685 - 2⁷ = 4128557 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 4128685.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14767 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (340272).

Almost surely, 2^4128685 is an apocalyptic number.

It is an amenable number.

4128685 is a deficient number, since it is larger than the sum of its proper divisors (1315667).

4128685 is a wasteful number, since it uses less digits than its factorization.

4128685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 15360, while the sum is 34.

The square root of 4128685 is about 2031.9165829335. The cubic root of 4128685 is about 160.4244589082.

The spelling of 4128685 in words is "four million, one hundred twenty-eight thousand, six hundred eighty-five".