2523521 has 16 divisors (see below), whose sum is σ = 3389568. Its totient is φ = 1814400.

The previous prime is 2523517. The next prime is 2523527. The reversal of 2523521 is 1253252.

It is not a de Polignac number, because 2523521 - 2² = 2523517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2523493 and 2523502.

It is not an unprimeable number, because it can be changed into a prime (2523527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (211848).

2^2523521 is an apocalyptic number.

It is an amenable number.

2523521 is a deficient number, since it is larger than the sum of its proper divisors (866047).

2523521 is a wasteful number, since it uses less digits than its factorization.

2523521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552.

The product of its digits is 600, while the sum is 20.

The square root of 2523521 is about 1588.5594102834. The cubic root of 2523521 is about 136.1451916819.

Adding to 2523521 its reverse (1253252), we get a palindrome (3776773).

It can be divided in two parts, 25235 and 21, that multiplied together give a triangular number (529935 = T₁₀₂₉).

The spelling of 2523521 in words is "two million, five hundred twenty-three thousand, five hundred twenty-one".