429501021 has 16 divisors (see below), whose sum is σ = 582039744. Its totient is φ = 281660544.

The previous prime is 429500999. The next prime is 429501031. The reversal of 429501021 is 120105924.

It is not a de Polignac number, because 429501021 - 2⁵ = 429500989 is a prime.

It is a super-2 number, since 2×429501021² = 368942254080084882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 429500982 and 429501000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429501031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223561 + ... + 225473.

It is an arithmetic number, because the mean of its divisors is an integer number (36377484).

Almost surely, 2^429501021 is an apocalyptic number.

It is an amenable number.

429501021 is a deficient number, since it is larger than the sum of its proper divisors (152538723).

429501021 is a wasteful number, since it uses less digits than its factorization.

429501021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 429501021 is about 20724.4064088697. The cubic root of 429501021 is about 754.4921637898.

Adding to 429501021 its reverse (120105924), we get a palindrome (549606945).

The spelling of 429501021 in words is "four hundred twenty-nine million, five hundred one thousand, twenty-one".