2575521 has 12 divisors (see below), whose sum is σ = 4006548. Its totient is φ = 1584864.

The previous prime is 2575499. The next prime is 2575523. The reversal of 2575521 is 1255752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1040400 + 1535121 = 1020^2 + 1239^2 .

It is not a de Polignac number, because 2575521 - 2⁶ = 2575457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2575523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10890 + ... + 11123.

It is an arithmetic number, because the mean of its divisors is an integer number (333879).

2^2575521 is an apocalyptic number.

It is an amenable number.

2575521 is a deficient number, since it is larger than the sum of its proper divisors (1431027).

2575521 is a wasteful number, since it uses less digits than its factorization.

2575521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032 (or 22029 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 2575521 is about 1604.8429829737. The cubic root of 2575521 is about 137.0739828086.

It can be divided in two parts, 257 and 5521, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 2575521 in words is "two million, five hundred seventy-five thousand, five hundred twenty-one".