429521 has 2 divisors, whose sum is σ = 429522. Its totient is φ = 429520.

The previous prime is 429511. The next prime is 429529. The reversal of 429521 is 125924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297025 + 132496 = 545^2 + 364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-429521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (429529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214760 + 214761.

It is an arithmetic number, because the mean of its divisors is an integer number (214761).

2⁴²⁹⁵²¹ is an apocalyptic number.

It is an amenable number.

429521 is a deficient number, since it is larger than the sum of its proper divisors (1).

429521 is an equidigital number, since it uses as much as digits as its factorization.

429521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 429521 is about 655.3785165841. The cubic root of 429521 is about 75.4503862454.

The spelling of 429521 in words is "four hundred twenty-nine thousand, five hundred twenty-one".