42123285047 has 2 divisors, whose sum is σ = 42123285048. Its totient is φ = 42123285046.

The previous prime is 42123285041. The next prime is 42123285079. The reversal of 42123285047 is 74058232124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42123285047 - 2²⁴ = 42106507831 is a prime.

It is a super-2 number, since 2×42123285047² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42123285047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42123285041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061642523 + 21061642524.

It is an arithmetic number, because the mean of its divisors is an integer number (21061642524).

Almost surely, 2^42123285047 is an apocalyptic number.

42123285047 is a deficient number, since it is larger than the sum of its proper divisors (1).

42123285047 is an equidigital number, since it uses as much as digits as its factorization.

42123285047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 42123285047 in words is "forty-two billion, one hundred twenty-three million, two hundred eighty-five thousand, forty-seven".