42140029 has 2 divisors, whose sum is σ = 42140030. Its totient is φ = 42140028.

The previous prime is 42140017. The next prime is 42140047. The reversal of 42140029 is 92004124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30272004 + 11868025 = 5502^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 42140029 - 2¹¹ = 42137981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42139991 and 42140009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42140089) 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, 21070014 + 21070015.

It is an arithmetic number, because the mean of its divisors is an integer number (21070015).

Almost surely, 2^42140029 is an apocalyptic number.

It is an amenable number.

42140029 is a deficient number, since it is larger than the sum of its proper divisors (1).

42140029 is an equidigital number, since it uses as much as digits as its factorization.

42140029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 42140029 is about 6491.5351805255. The cubic root of 42140029 is about 347.9885411517.

The spelling of 42140029 in words is "forty-two million, one hundred forty thousand, twenty-nine".