8121392 has 40 divisors (see below), whose sum is σ = 17007840. Its totient is φ = 3745280.

The previous prime is 8121383. The next prime is 8121397. The reversal of 8121392 is 2931218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10292 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (425196).

Almost surely, 2^8121392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8121392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8503920).

8121392 is an abundant number, since it is smaller than the sum of its proper divisors (8886448).

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

8121392 is a wasteful number, since it uses less digits than its factorization.

8121392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 815 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 8121392 is about 2849.8056074055. The cubic root of 8121392 is about 201.0065260292.

The spelling of 8121392 in words is "eight million, one hundred twenty-one thousand, three hundred ninety-two".