8004492121 has 16 divisors (see below), whose sum is σ = 8723001600. Its totient is φ = 7320129408.

The previous prime is 8004492103. The next prime is 8004492137. The reversal of 8004492121 is 1212944008.

It is a cyclic number.

It is not a de Polignac number, because 8004492121 - 2⁹ = 8004491609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8004492191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3795 + ... + 126583.

It is an arithmetic number, because the mean of its divisors is an integer number (545187600).

Almost surely, 2^8004492121 is an apocalyptic number.

It is an amenable number.

8004492121 is a deficient number, since it is larger than the sum of its proper divisors (718509479).

8004492121 is a wasteful number, since it uses less digits than its factorization.

8004492121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122928.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 8004492121 is about 89467.8272956262. The cubic root of 8004492121 is about 2000.3742733720.

The spelling of 8004492121 in words is "eight billion, four million, four hundred ninety-two thousand, one hundred twenty-one".