8121678 has 8 divisors (see below), whose sum is σ = 16243368. Its totient is φ = 2707224.

The previous prime is 8121677. The next prime is 8121679. The reversal of 8121678 is 8761218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8121677) and next prime (8121679).

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

8121678 is an admirable number.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121671) 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, 676801 + ... + 676812.

It is an arithmetic number, because the mean of its divisors is an integer number (2030421).

Almost surely, 2^8121678 is an apocalyptic number.

8121678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8121678 is a wasteful number, since it uses less digits than its factorization.

8121678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353618.

The product of its digits is 5376, while the sum is 33.

The square root of 8121678 is about 2849.8557858250. The cubic root of 8121678 is about 201.0088855259.

It can be divided in two parts, 812167 and 8, that added together give a triangular number (812175 = T₁₂₇₄).

The spelling of 8121678 in words is "eight million, one hundred twenty-one thousand, six hundred seventy-eight".