29418421 has 4 divisors (see below), whose sum is σ = 29633292. Its totient is φ = 29203552.

The previous prime is 29418413. The next prime is 29418457. The reversal of 29418421 is 12481492.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6002500 + 23415921 = 2450^2 + 4839^2 .

It is a cyclic number.

It is not a de Polignac number, because 29418421 - 2³ = 29418413 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29418401) 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, 107230 + ... + 107503.

It is an arithmetic number, because the mean of its divisors is an integer number (7408323).

Almost surely, 2^29418421 is an apocalyptic number.

It is an amenable number.

29418421 is a deficient number, since it is larger than the sum of its proper divisors (214871).

29418421 is a wasteful number, since it uses less digits than its factorization.

29418421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214870.

The product of its digits is 4608, while the sum is 31.

The square root of 29418421 is about 5423.8750907446. The cubic root of 29418421 is about 308.7022438662.

The spelling of 29418421 in words is "twenty-nine million, four hundred eighteen thousand, four hundred twenty-one".