42817129 has 4 divisors (see below), whose sum is σ = 42864640. Its totient is φ = 42769620.

The previous prime is 42817123. The next prime is 42817139. The reversal of 42817129 is 92171824.

42817129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42817129 - 2⁷ = 42817001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42817094 and 42817103.

It is not an unprimeable number, because it can be changed into a prime (42817123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22377 + ... + 24214.

It is an arithmetic number, because the mean of its divisors is an integer number (10716160).

Almost surely, 2^42817129 is an apocalyptic number.

It is an amenable number.

42817129 is a deficient number, since it is larger than the sum of its proper divisors (47511).

42817129 is an equidigital number, since it uses as much as digits as its factorization.

42817129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47510.

The product of its digits is 8064, while the sum is 34.

The square root of 42817129 is about 6543.4798845874. The cubic root of 42817129 is about 349.8424569881.

The spelling of 42817129 in words is "forty-two million, eight hundred seventeen thousand, one hundred twenty-nine".