5121818 has 8 divisors (see below), whose sum is σ = 8273748. Its totient is φ = 2363904.

The previous prime is 5121797. The next prime is 5121821. The reversal of 5121818 is 8181215.

It can be written as a sum of positive squares in 2 ways, for example, as 5004169 + 117649 = 2237^2 + 343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 196993 = 5121818 / (5 + 1 + 2 + 1 + 8 + 1 + 8).

5121818 is a modest number, since divided by 1818 gives 512 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98471 + ... + 98522.

Almost surely, 2^5121818 is an apocalyptic number.

5121818 is a deficient number, since it is larger than the sum of its proper divisors (3151930).

5121818 is a wasteful number, since it uses less digits than its factorization.

5121818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197008.

The product of its digits is 640, while the sum is 26.

The square root of 5121818 is about 2263.1433891824. The cubic root of 5121818 is about 172.3751725920.

The spelling of 5121818 in words is "five million, one hundred twenty-one thousand, eight hundred eighteen".