4121686 has 4 divisors (see below), whose sum is σ = 6182532. Its totient is φ = 2060842.

The previous prime is 4121657. The next prime is 4121687. The reversal of 4121686 is 6861214.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030420 + ... + 1030423.

It is an arithmetic number, because the mean of its divisors is an integer number (1545633).

Almost surely, 2^4121686 is an apocalyptic number.

4121686 is a deficient number, since it is larger than the sum of its proper divisors (2060846).

4121686 is a wasteful number, since it uses less digits than its factorization.

4121686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060845.

The product of its digits is 2304, while the sum is 28.

The square root of 4121686 is about 2030.1935868286. The cubic root of 4121686 is about 160.3337564324. Note that the first 3 decimals are identical.

The spelling of 4121686 in words is "four million, one hundred twenty-one thousand, six hundred eighty-six".