42420501247 has 2 divisors, whose sum is σ = 42420501248. Its totient is φ = 42420501246.

The previous prime is 42420501113. The next prime is 42420501257. The reversal of 42420501247 is 74210502424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42420501247 - 2¹⁹ = 42419976959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42420501257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210250623 + 21210250624.

It is an arithmetic number, because the mean of its divisors is an integer number (21210250624).

Almost surely, 2^42420501247 is an apocalyptic number.

42420501247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420501247 is an equidigital number, since it uses as much as digits as its factorization.

42420501247 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 31.

The spelling of 42420501247 in words is "forty-two billion, four hundred twenty million, five hundred one thousand, two hundred forty-seven".