4121819 has 4 divisors (see below), whose sum is σ = 4438896. Its totient is φ = 3804744.

The previous prime is 4121809. The next prime is 4121827. The reversal of 4121819 is 9181214.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4121819 is a prime.

It is a super-2 number, since 2×4121819² = 33978783737522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4121809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158519 + ... + 158544.

It is an arithmetic number, because the mean of its divisors is an integer number (1109724).

Almost surely, 2^4121819 is an apocalyptic number.

4121819 is a deficient number, since it is larger than the sum of its proper divisors (317077).

4121819 is a wasteful number, since it uses less digits than its factorization.

4121819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317076.

The product of its digits is 576, while the sum is 26.

The square root of 4121819 is about 2030.2263420614. The cubic root of 4121819 is about 160.3354809824.

The spelling of 4121819 in words is "four million, one hundred twenty-one thousand, eight hundred nineteen".