42520847 has 2 divisors, whose sum is σ = 42520848. Its totient is φ = 42520846.

The previous prime is 42520831. The next prime is 42520889. The reversal of 42520847 is 74802524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42520847 - 2⁴ = 42520831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520447) 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, 21260423 + 21260424.

It is an arithmetic number, because the mean of its divisors is an integer number (21260424).

Almost surely, 2^42520847 is an apocalyptic number.

42520847 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520847 is an equidigital number, since it uses as much as digits as its factorization.

42520847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42520847 is about 6520.8011010918. The cubic root of 42520847 is about 349.0336527457.

The spelling of 42520847 in words is "forty-two million, five hundred twenty thousand, eight hundred forty-seven".