42102429947 has 2 divisors, whose sum is σ = 42102429948. Its totient is φ = 42102429946.

The previous prime is 42102429829. The next prime is 42102429949. The reversal of 42102429947 is 74992420124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42102429947 - 2¹² = 42102425851 is a prime.

It is a super-2 number, since 2×42102429947² (a number of 22 digits) contains 22 as substring.

Together with 42102429949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42102429898 and 42102429907.

It is not a weakly prime, because it can be changed into another prime (42102429949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051214973 + 21051214974.

It is an arithmetic number, because the mean of its divisors is an integer number (21051214974).

Almost surely, 2^42102429947 is an apocalyptic number.

42102429947 is a deficient number, since it is larger than the sum of its proper divisors (1).

42102429947 is an equidigital number, since it uses as much as digits as its factorization.

42102429947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 42102429947 in words is "forty-two billion, one hundred two million, four hundred twenty-nine thousand, nine hundred forty-seven".