420429 has 4 divisors (see below), whose sum is σ = 560576. Its totient is φ = 280284.

The previous prime is 420421. The next prime is 420439. The reversal of 420429 is 924024.

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 not a de Polignac number, because 420429 - 2³ = 420421 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70069 + ... + 70074.

It is an arithmetic number, because the mean of its divisors is an integer number (140144).

2⁴²⁰⁴²⁹ is an apocalyptic number.

It is an amenable number.

420429 is a deficient number, since it is larger than the sum of its proper divisors (140147).

420429 is a wasteful number, since it uses less digits than its factorization.

420429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140146.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 420429 is about 648.4049660513. The cubic root of 420429 is about 74.9142130231.

The spelling of 420429 in words is "four hundred twenty thousand, four hundred twenty-nine".