2521537 has 2 divisors, whose sum is σ = 2521538. Its totient is φ = 2521536.

The previous prime is 2521517. The next prime is 2521591. The reversal of 2521537 is 7351252.

2521537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 802816 = 1311^2 + 896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521537 is a prime.

It is a d-powerful number, because it can be written as 2⁶ + 5⁸ + 2¹⁰ + 1 + 5⁹ + 3¹⁰ + 7⁶ .

It is not a weakly prime, because it can be changed into another prime (2521507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260768 + 1260769.

It is an arithmetic number, because the mean of its divisors is an integer number (1260769).

2^2521537 is an apocalyptic number.

It is an amenable number.

2521537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521537 is an equidigital number, since it uses as much as digits as its factorization.

2521537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 25.

The square root of 2521537 is about 1587.9348223400. The cubic root of 2521537 is about 136.1095030708.

Adding to 2521537 its reverse (7351252), we get a palindrome (9872789).

It can be divided in two parts, 25215 and 37, that added together give a palindrome (25252).

The spelling of 2521537 in words is "two million, five hundred twenty-one thousand, five hundred thirty-seven".