429421 has 4 divisors (see below), whose sum is σ = 432000. Its totient is φ = 426844.

The previous prime is 429413. The next prime is 429427. The reversal of 429421 is 124924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 429421 - 2³ = 429413 is a prime.

It is a Duffinian number.

429421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 429392 and 429401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1021 + ... + 1378.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2⁴²⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

429421 is a deficient number, since it is larger than the sum of its proper divisors (2579).

429421 is a wasteful number, since it uses less digits than its factorization.

429421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578.

The product of its digits is 576, while the sum is 22.

The square root of 429421 is about 655.3022203533. The cubic root of 429421 is about 75.4445304012. Note that the first 3 decimals are identical.

The spelling of 429421 in words is "four hundred twenty-nine thousand, four hundred twenty-one".