8121418 has 8 divisors (see below), whose sum is σ = 12382020. Its totient is φ = 3994080.

The previous prime is 8121401. The next prime is 8121419. The reversal of 8121418 is 8141218.

It can be written as a sum of positive squares in 2 ways, for example, as 5583769 + 2537649 = 2363^2 + 1593^2 .

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

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 = 8121392 and 8121401.

It is not an unprimeable number, because it can be changed into a prime (8121419) 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, 33163 + ... + 33406.

Almost surely, 2^8121418 is an apocalyptic number.

8121418 is a deficient number, since it is larger than the sum of its proper divisors (4260602).

8121418 is a wasteful number, since it uses less digits than its factorization.

8121418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66632.

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

The square root of 8121418 is about 2849.8101691165. The cubic root of 8121418 is about 201.0067405312.

The spelling of 8121418 in words is "eight million, one hundred twenty-one thousand, four hundred eighteen".