7145125 has 16 divisors (see below), whose sum is σ = 9605232. Its totient is φ = 5275200.

The previous prime is 7145101. The next prime is 7145129. The reversal of 7145125 is 5215417.

It can be written as a sum of positive squares in 8 ways, for example, as 3755844 + 3389281 = 1938^2 + 1841^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7145125 is a prime.

It is a super-2 number, since 2×7145125² = 102105622531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 7145125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 574 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (600327).

Almost surely, 2^7145125 is an apocalyptic number.

It is an amenable number.

7145125 is a deficient number, since it is larger than the sum of its proper divisors (2460107).

7145125 is a wasteful number, since it uses less digits than its factorization.

7145125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425 (or 4415 counting only the distinct ones).

The product of its digits is 1400, while the sum is 25.

The square root of 7145125 is about 2673.0366626741. The cubic root of 7145125 is about 192.6060583830.

The spelling of 7145125 in words is "seven million, one hundred forty-five thousand, one hundred twenty-five".