4121816 has 8 divisors (see below), whose sum is σ = 7728420. Its totient is φ = 2060904.

The previous prime is 4121809. The next prime is 4121827. The reversal of 4121816 is 6181214.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 4121791 and 4121800.

It is a congruent number.

It is an unprimeable number.

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, 257606 + ... + 257621.

Almost surely, 2^4121816 is an apocalyptic number.

It is an amenable number.

4121816 is a deficient number, since it is larger than the sum of its proper divisors (3606604).

4121816 is a wasteful number, since it uses less digits than its factorization.

4121816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515233 (or 515229 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 4121816 is about 2030.2256032274. The cubic root of 4121816 is about 160.3354420832.

The spelling of 4121816 in words is "four million, one hundred twenty-one thousand, eight hundred sixteen".