429721 has 8 divisors (see below), whose sum is σ = 451584. Its totient is φ = 408480.

The previous prime is 429719. The next prime is 429727. The reversal of 429721 is 127924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 429721 - 2¹ = 429719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (429727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816 + ... + 2038.

It is an arithmetic number, because the mean of its divisors is an integer number (56448).

2⁴²⁹⁷²¹ is an apocalyptic number.

429721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

429721 is a deficient number, since it is larger than the sum of its proper divisors (21863).

429721 is a wasteful number, since it uses less digits than its factorization.

429721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its digits is 1008, while the sum is 25.

The square root of 429721 is about 655.5310824057. The cubic root of 429721 is about 75.4620952078.

The spelling of 429721 in words is "four hundred twenty-nine thousand, seven hundred twenty-one".