7109145 has 24 divisors (see below), whose sum is σ = 13048776. Its totient is φ = 3568128.

The previous prime is 7109119. The next prime is 7109171. The reversal of 7109145 is 5419017.

It is an interprime number because it is at equal distance from previous prime (7109119) and next prime (7109171).

It can be written as a sum of positive squares in 4 ways, for example, as 328329 + 6780816 = 573^2 + 2604^2 .

It is not a de Polignac number, because 7109145 - 2¹⁰ = 7108121 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3882 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (543699).

Almost surely, 2^7109145 is an apocalyptic number.

It is an amenable number.

7109145 is a deficient number, since it is larger than the sum of its proper divisors (5939631).

7109145 is a wasteful number, since it uses less digits than its factorization.

7109145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321 (or 9318 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 7109145 is about 2666.2979953486. The cubic root of 7109145 is about 192.2822184309.

The spelling of 7109145 in words is "seven million, one hundred nine thousand, one hundred forty-five".