4128686 has 4 divisors (see below), whose sum is σ = 6193032. Its totient is φ = 2064342.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128686 is 6868214.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×4128686³ (a number of 21 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 1032170 + ... + 1032173.

It is an arithmetic number, because the mean of its divisors is an integer number (1548258).

Almost surely, 2^4128686 is an apocalyptic number.

4128686 is a deficient number, since it is larger than the sum of its proper divisors (2064346).

4128686 is a wasteful number, since it uses less digits than its factorization.

4128686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064345.

The product of its digits is 18432, while the sum is 35.

The square root of 4128686 is about 2031.9168290065. The cubic root of 4128686 is about 160.4244718603.

The spelling of 4128686 in words is "four million, one hundred twenty-eight thousand, six hundred eighty-six".