29421 has 12 divisors (see below), whose sum is σ = 48672. Its totient is φ = 16776.

The previous prime is 29411. The next prime is 29423. The reversal of 29421 is 12492.

It is not a de Polignac number, because 29421 - 2⁵ = 29389 is a prime.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 29394 and 29403.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 29421.

It is not an unprimeable number, because it can be changed into a prime (29423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171 + ... + 296.

It is an arithmetic number, because the mean of its divisors is an integer number (4056).

2²⁹⁴²¹ is an apocalyptic number.

29421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29421 is a deficient number, since it is larger than the sum of its proper divisors (19251).

29421 is a wasteful number, since it uses less digits than its factorization.

29421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 477 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 29421 is about 171.5255083071. The cubic root of 29421 is about 30.8711264516.

Subtracting from 29421 its sum of digits (18), we obtain a triangular number (29403 = T₂₄₂).

The spelling of 29421 in words is "twenty-nine thousand, four hundred twenty-one".