1525165 has 4 divisors (see below), whose sum is σ = 1830204. Its totient is φ = 1220128.

The previous prime is 1525163. The next prime is 1525171. The reversal of 1525165 is 5615251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5615251 = 103 ⋅54517.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 1196836 = 573^2 + 1094^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525165 - 2¹ = 1525163 is a prime.

It is a super-2 number, since 2×1525165² = 4652256554450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525163) 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, 152512 + ... + 152521.

It is an arithmetic number, because the mean of its divisors is an integer number (457551).

2^1525165 is an apocalyptic number.

It is an amenable number.

1525165 is a deficient number, since it is larger than the sum of its proper divisors (305039).

1525165 is an equidigital number, since it uses as much as digits as its factorization.

1525165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305038.

The product of its digits is 1500, while the sum is 25.

The square root of 1525165 is about 1234.9757082631. The cubic root of 1525165 is about 115.1080270358.

The spelling of 1525165 in words is "one million, five hundred twenty-five thousand, one hundred sixty-five".