42108429 has 8 divisors (see below), whose sum is σ = 61248672. Its totient is φ = 25520240.

The previous prime is 42108401. The next prime is 42108431. The reversal of 42108429 is 92480124.

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 42108429 - 2⁷ = 42108301 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42108396 and 42108405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42108449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637974 + ... + 638039.

It is an arithmetic number, because the mean of its divisors is an integer number (7656084).

Almost surely, 2^42108429 is an apocalyptic number.

It is an amenable number.

42108429 is a deficient number, since it is larger than the sum of its proper divisors (19140243).

42108429 is a wasteful number, since it uses less digits than its factorization.

42108429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276027.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 42108429 is about 6489.1007851628. The cubic root of 42108429 is about 347.9015360881.

The spelling of 42108429 in words is "forty-two million, one hundred eight thousand, four hundred twenty-nine".