429861921 has 8 divisors (see below), whose sum is σ = 573311424. Its totient is φ = 286493520.

The previous prime is 429861899. The next prime is 429861961. The reversal of 429861921 is 129168924.

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

It is not a de Polignac number, because 429861921 - 2⁵ = 429861889 is a prime.

It is a super-2 number, since 2×429861921² = 369562542251620482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (429861961) 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, 6586 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (71663928).

Almost surely, 2^429861921 is an apocalyptic number.

It is an amenable number.

429861921 is a deficient number, since it is larger than the sum of its proper divisors (143449503).

429861921 is a wasteful number, since it uses less digits than its factorization.

429861921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40551.

The product of its digits is 62208, while the sum is 42.

The square root of 429861921 is about 20733.1117056751. Note that the first 3 decimals coincide. The cubic root of 429861921 is about 754.7034321967.

The spelling of 429861921 in words is "four hundred twenty-nine million, eight hundred sixty-one thousand, nine hundred twenty-one".