29129221 has 8 divisors (see below), whose sum is σ = 31963104. Its totient is φ = 26326320.

The previous prime is 29129179. The next prime is 29129227. The reversal of 29129221 is 12292192.

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 29129221 - 2¹⁷ = 28998149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29129221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29129227) 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, 5751 + ... + 9556.

It is an arithmetic number, because the mean of its divisors is an integer number (3995388).

Almost surely, 2^29129221 is an apocalyptic number.

It is an amenable number.

29129221 is a deficient number, since it is larger than the sum of its proper divisors (2833883).

29129221 is a wasteful number, since it uses less digits than its factorization.

29129221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15491.

The product of its digits is 1296, while the sum is 28.

The square root of 29129221 is about 5397.1493401610. The cubic root of 29129221 is about 307.6873373187.

The spelling of 29129221 in words is "twenty-nine million, one hundred twenty-nine thousand, two hundred twenty-one".