42809129 has 8 divisors (see below), whose sum is σ = 47467200. Its totient is φ = 38278800.

The previous prime is 42809113. The next prime is 42809131. The reversal of 42809129 is 92190824.

42809129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42809129 - 2⁴ = 42809113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42809149) 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 7 ways as a sum of consecutive naturals, for example, 31229 + ... + 32570.

It is an arithmetic number, because the mean of its divisors is an integer number (5933400).

Almost surely, 2^42809129 is an apocalyptic number.

It is an amenable number.

42809129 is a deficient number, since it is larger than the sum of its proper divisors (4658071).

42809129 is a wasteful number, since it uses less digits than its factorization.

42809129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63871.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 42809129 is about 6542.8685605016. The cubic root of 42809129 is about 349.8206673130.

The spelling of 42809129 in words is "forty-two million, eight hundred nine thousand, one hundred twenty-nine".