29421905 has 8 divisors (see below), whose sum is σ = 35335872. Its totient is φ = 23517808.

The previous prime is 29421881. The next prime is 29421913. The reversal of 29421905 is 50912492.

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 29421905 - 2⁶ = 29421841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8684 + ... + 11586.

It is an arithmetic number, because the mean of its divisors is an integer number (4416984).

Almost surely, 2^29421905 is an apocalyptic number.

It is an amenable number.

29421905 is a deficient number, since it is larger than the sum of its proper divisors (5913967).

29421905 is a wasteful number, since it uses less digits than its factorization.

29421905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 29421905 is about 5424.1962538242. The cubic root of 29421905 is about 308.7144298382.

The spelling of 29421905 in words is "twenty-nine million, four hundred twenty-one thousand, nine hundred five".