42520540247 has 2 divisors, whose sum is σ = 42520540248. Its totient is φ = 42520540246.

The previous prime is 42520540217. The next prime is 42520540327. The reversal of 42520540247 is 74204502524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42520540247 - 2¹⁴ = 42520523863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520540217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260270123 + 21260270124.

It is an arithmetic number, because the mean of its divisors is an integer number (21260270124).

Almost surely, 2^42520540247 is an apocalyptic number.

42520540247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520540247 is an equidigital number, since it uses as much as digits as its factorization.

42520540247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 35.

The spelling of 42520540247 in words is "forty-two billion, five hundred twenty million, five hundred forty thousand, two hundred forty-seven".