429807421 has 4 divisors (see below), whose sum is σ = 429859552. Its totient is φ = 429755292.

The previous prime is 429807401. The next prime is 429807431. The reversal of 429807421 is 124708924.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 429807421 - 2⁷ = 429807293 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 (429807401) 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, 10665 + ... + 31198.

It is an arithmetic number, because the mean of its divisors is an integer number (107464888).

Almost surely, 2^429807421 is an apocalyptic number.

It is an amenable number.

429807421 is a deficient number, since it is larger than the sum of its proper divisors (52131).

429807421 is a wasteful number, since it uses less digits than its factorization.

429807421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52130.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 429807421 is about 20731.7973412823. The cubic root of 429807421 is about 754.6715358493.

The spelling of 429807421 in words is "four hundred twenty-nine million, eight hundred seven thousand, four hundred twenty-one".