429442421 has 4 divisors (see below), whose sum is σ = 429787500. Its totient is φ = 429097344.

The previous prime is 429442417. The next prime is 429442441. The reversal of 429442421 is 124244924.

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 136656100 + 292786321 = 11690^2 + 17111^2 .

It is a cyclic number.

It is not a de Polignac number, because 429442421 - 2² = 429442417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429442441) 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, 170666 + ... + 173163.

It is an arithmetic number, because the mean of its divisors is an integer number (107446875).

Almost surely, 2^429442421 is an apocalyptic number.

It is an amenable number.

429442421 is a deficient number, since it is larger than the sum of its proper divisors (345079).

429442421 is a wasteful number, since it uses less digits than its factorization.

429442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345078.

The product of its digits is 18432, while the sum is 32.

The square root of 429442421 is about 20722.9925686422. The cubic root of 429442421 is about 754.4578485810.

The spelling of 429442421 in words is "four hundred twenty-nine million, four hundred forty-two thousand, four hundred twenty-one".