7117121 has 4 divisors (see below), whose sum is σ = 7764144. Its totient is φ = 6470100.

The previous prime is 7117109. The next prime is 7117129. The reversal of 7117121 is 1217117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1217117 = 11 ⋅110647.

It is a cyclic number.

It is not a de Polignac number, because 7117121 - 2⁶ = 7117057 is a prime.

It is a super-2 number, since 2×7117121² = 101306822657282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7117093 and 7117102.

It is not an unprimeable number, because it can be changed into a prime (7117129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323495 + ... + 323516.

It is an arithmetic number, because the mean of its divisors is an integer number (1941036).

Almost surely, 2^7117121 is an apocalyptic number.

It is an amenable number.

7117121 is a deficient number, since it is larger than the sum of its proper divisors (647023).

7117121 is a wasteful number, since it uses less digits than its factorization.

7117121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647022.

The product of its digits is 98, while the sum is 20.

The square root of 7117121 is about 2667.7932828463. The cubic root of 7117121 is about 192.3541009513.

The spelling of 7117121 in words is "seven million, one hundred seventeen thousand, one hundred twenty-one".