72520543 has 2 divisors, whose sum is σ = 72520544. Its totient is φ = 72520542.

The previous prime is 72520537. The next prime is 72520559. The reversal of 72520543 is 34502527.

It is a weak prime.

It is an emirp because it is prime and its reverse (34502527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72520543 - 2⁹ = 72520031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72520573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36260271 + 36260272.

It is an arithmetic number, because the mean of its divisors is an integer number (36260272).

Almost surely, 2^72520543 is an apocalyptic number.

72520543 is a deficient number, since it is larger than the sum of its proper divisors (1).

72520543 is an equidigital number, since it uses as much as digits as its factorization.

72520543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 72520543 is about 8515.8994240186. The cubic root of 72520543 is about 417.0169258197.

The spelling of 72520543 in words is "seventy-two million, five hundred twenty thousand, five hundred forty-three".