4121818 has 4 divisors (see below), whose sum is σ = 6182730. Its totient is φ = 2060908.

The previous prime is 4121809. The next prime is 4121827. The reversal of 4121818 is 8181214.

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

It is an interprime number because it is at equal distance from previous prime (4121809) and next prime (4121827).

It can be written as a sum of positive squares in only one way, i.e., 3972049 + 149769 = 1993^2 + 387^2 .

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

4121818 is a modest number, since divided by 1818 gives 412 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 4121792 and 4121801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030453 + ... + 1030456.

Almost surely, 2^4121818 is an apocalyptic number.

4121818 is a deficient number, since it is larger than the sum of its proper divisors (2060912).

4121818 is a wasteful number, since it uses less digits than its factorization.

4121818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060911.

The product of its digits is 512, while the sum is 25.

The square root of 4121818 is about 2030.2260957834. The cubic root of 4121818 is about 160.3354680160.

The spelling of 4121818 in words is "four million, one hundred twenty-one thousand, eight hundred eighteen".