7111145 has 4 divisors (see below), whose sum is σ = 8533380. Its totient is φ = 5688912.

The previous prime is 7111127. The next prime is 7111157. The reversal of 7111145 is 5411117.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5411117 = 17 ⋅318301.

It can be written as a sum of positive squares in 2 ways, for example, as 3474496 + 3636649 = 1864^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 7111145 - 2⁸ = 7110889 is a prime.

It is a super-2 number, since 2×7111145² = 101136766422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711110 + ... + 711119.

It is an arithmetic number, because the mean of its divisors is an integer number (2133345).

Almost surely, 2^7111145 is an apocalyptic number.

It is an amenable number.

7111145 is a deficient number, since it is larger than the sum of its proper divisors (1422235).

7111145 is a wasteful number, since it uses less digits than its factorization.

7111145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422234.

The product of its digits is 140, while the sum is 20.

The square root of 7111145 is about 2666.6730208258. The cubic root of 7111145 is about 192.3002481836.

The spelling of 7111145 in words is "seven million, one hundred eleven thousand, one hundred forty-five".