7159121 has 4 divisors (see below), whose sum is σ = 7172532. Its totient is φ = 7145712.

The previous prime is 7159111. The next prime is 7159147. The reversal of 7159121 is 1219517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1219517 = 13 ⋅93809.

It can be written as a sum of positive squares in 2 ways, for example, as 1132096 + 6027025 = 1064^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 7159121 - 2¹⁰ = 7158097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7159111) 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 3 ways as a sum of consecutive naturals, for example, 5870 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (1793133).

Almost surely, 2^7159121 is an apocalyptic number.

It is an amenable number.

7159121 is a deficient number, since it is larger than the sum of its proper divisors (13411).

7159121 is a wasteful number, since it uses less digits than its factorization.

7159121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13410.

The product of its digits is 630, while the sum is 26.

The square root of 7159121 is about 2675.6533781490. The cubic root of 7159121 is about 192.7317364347.

The spelling of 7159121 in words is "seven million, one hundred fifty-nine thousand, one hundred twenty-one".