7521165 has 24 divisors (see below), whose sum is σ = 13100568. Its totient is φ = 3991680.

The previous prime is 7521149. The next prime is 7521197. The reversal of 7521165 is 5611257.

7521165 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 19044 + 7502121 = 138^2 + 2739^2 .

It is not a de Polignac number, because 7521165 - 2⁴ = 7521149 is a prime.

It is a congruent 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, 17655 + ... + 18075.

It is an arithmetic number, because the mean of its divisors is an integer number (545857).

Almost surely, 2^7521165 is an apocalyptic number.

It is an amenable number.

7521165 is a deficient number, since it is larger than the sum of its proper divisors (5579403).

7521165 is a wasteful number, since it uses less digits than its factorization.

7521165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 826 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 7521165 is about 2742.4742478280. The cubic root of 7521165 is about 195.9273383999.

The spelling of 7521165 in words is "seven million, five hundred twenty-one thousand, one hundred sixty-five".