8121340 has 12 divisors (see below), whose sum is σ = 17054856. Its totient is φ = 3248528.

The previous prime is 8121331. The next prime is 8121371. The reversal of 8121340 is 431218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203014 + ... + 203053.

It is an arithmetic number, because the mean of its divisors is an integer number (1421238).

Almost surely, 2^8121340 is an apocalyptic number.

It is an amenable number.

8121340 is an abundant number, since it is smaller than the sum of its proper divisors (8933516).

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

8121340 is a wasteful number, since it uses less digits than its factorization.

8121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406076 (or 406074 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 8121340 is about 2849.7964839616. The cubic root of 8121340 is about 201.0060970239.

Adding to 8121340 its reverse (431218), we get a palindrome (8552558).

The spelling of 8121340 in words is "eight million, one hundred twenty-one thousand, three hundred forty".