42020029 has 2 divisors, whose sum is σ = 42020030. Its totient is φ = 42020028.

The previous prime is 42020023. The next prime is 42020059. The reversal of 42020029 is 92002024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41024025 + 996004 = 6405^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 42020029 - 2⁹ = 42019517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42019988 and 42020015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42020023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010014 + 21010015.

It is an arithmetic number, because the mean of its divisors is an integer number (21010015).

Almost surely, 2^42020029 is an apocalyptic number.

It is an amenable number.

42020029 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020029 is an equidigital number, since it uses as much as digits as its factorization.

42020029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 42020029 is about 6482.2857851224. The cubic root of 42020029 is about 347.6579107375.

It can be divided in two parts, 420 and 20029, that added together give a square (20449 = 143²).

The spelling of 42020029 in words is "forty-two million, twenty thousand, twenty-nine".