2530521 has 20 divisors (see below), whose sum is σ = 4321152. Its totient is φ = 1445688.

The previous prime is 2530519. The next prime is 2530543. The reversal of 2530521 is 1250352.

It is a happy number.

It is not a de Polignac number, because 2530521 - 2¹ = 2530519 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2530494 and 2530503.

It is not an unprimeable number, because it can be changed into a prime (2530571) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1665 + ... + 2798.

2^2530521 is an apocalyptic number.

2530521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2530521 is a deficient number, since it is larger than the sum of its proper divisors (1790631).

2530521 is an equidigital number, since it uses as much as digits as its factorization.

2530521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482 (or 4473 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2530521 is about 1590.7611385749. The cubic root of 2530521 is about 136.2709599379.

Adding to 2530521 its reverse (1250352), we get a palindrome (3780873).

The spelling of 2530521 in words is "two million, five hundred thirty thousand, five hundred twenty-one".