8121091 has 8 divisors (see below), whose sum is σ = 8880624. Its totient is φ = 7365120.

The previous prime is 8121089. The next prime is 8121097. The reversal of 8121091 is 1901218.

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

It is a cyclic number.

It is not a de Polignac number, because 8121091 - 2¹ = 8121089 is a prime.

It is a Duffinian number.

8121091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8121097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6855 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (1110078).

Almost surely, 2^8121091 is an apocalyptic number.

8121091 is a deficient number, since it is larger than the sum of its proper divisors (759533).

8121091 is a wasteful number, since it uses less digits than its factorization.

8121091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 8121091 is about 2849.7527962965. The cubic root of 8121091 is about 201.0040427229.

The spelling of 8121091 in words is "eight million, one hundred twenty-one thousand, ninety-one".