8113121 has 8 divisors (see below), whose sum is σ = 8348424. Its totient is φ = 7879680.

The previous prime is 8113109. The next prime is 8113153. The reversal of 8113121 is 1213118.

It can be written as a sum of positive squares in 4 ways, for example, as 70225 + 8042896 = 265^2 + 2836^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8113121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8113121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8113321) 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, 17525 + ... + 17981.

It is an arithmetic number, because the mean of its divisors is an integer number (1043553).

Almost surely, 2^8113121 is an apocalyptic number.

It is an amenable number.

8113121 is a deficient number, since it is larger than the sum of its proper divisors (235303).

8113121 is a wasteful number, since it uses less digits than its factorization.

8113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 48, while the sum is 17.

The square root of 8113121 is about 2848.3540861347. The cubic root of 8113121 is about 200.9382663975.

Adding to 8113121 its reverse (1213118), we get a palindrome (9326239).

The spelling of 8113121 in words is "eight million, one hundred thirteen thousand, one hundred twenty-one".