429521121 has 24 divisors (see below), whose sum is σ = 640404960. Its totient is φ = 277269696.

The previous prime is 429521119. The next prime is 429521143. The reversal of 429521121 is 121125924.

429521121 is a `hidden beast` number, since 429 + 5 + 211 + 21 = 666.

It is not a de Polignac number, because 429521121 - 2¹ = 429521119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (429521171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29541 + ... + 41613.

It is an arithmetic number, because the mean of its divisors is an integer number (26683540).

Almost surely, 2^429521121 is an apocalyptic number.

It is an amenable number.

429521121 is a deficient number, since it is larger than the sum of its proper divisors (210883839).

429521121 is a wasteful number, since it uses less digits than its factorization.

429521121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12205 (or 12202 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 429521121 is about 20724.8913386777. The cubic root of 429521121 is about 754.5039333047.

The spelling of 429521121 in words is "four hundred twenty-nine million, five hundred twenty-one thousand, one hundred twenty-one".