2543537 has 2 divisors, whose sum is σ = 2543538. Its totient is φ = 2543536.

The previous prime is 2543509. The next prime is 2543551. The reversal of 2543537 is 7353452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1784896 + 758641 = 1336^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543537 - 2¹⁰ = 2542513 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁸ + 5⁴ + 4⁵ + 3¹¹ + 5⁸ + 3¹³ + 7⁶ .

It is not a weakly prime, because it can be changed into another prime (2543507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271768 + 1271769.

It is an arithmetic number, because the mean of its divisors is an integer number (1271769).

2^2543537 is an apocalyptic number.

It is an amenable number.

2543537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543537 is an equidigital number, since it uses as much as digits as its factorization.

2543537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 29.

The square root of 2543537 is about 1594.8470146067. The cubic root of 2543537 is about 136.5042018144.

Adding to 2543537 its reverse (7353452), we get a palindrome (9896989).

The spelling of 2543537 in words is "two million, five hundred forty-three thousand, five hundred thirty-seven".