521429 has 2 divisors, whose sum is σ = 521430. Its totient is φ = 521428.

The previous prime is 521401. The next prime is 521447. The reversal of 521429 is 924125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487204 + 34225 = 698^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 521429 - 2⁸ = 521173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260714 + 260715.

It is an arithmetic number, because the mean of its divisors is an integer number (260715).

2⁵²¹⁴²⁹ is an apocalyptic number.

It is an amenable number.

521429 is a deficient number, since it is larger than the sum of its proper divisors (1).

521429 is an equidigital number, since it uses as much as digits as its factorization.

521429 is an odious number, because the sum of its binary digits is odd.

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

The square root of 521429 is about 722.1004085306. The cubic root of 521429 is about 80.4881095564.

The spelling of 521429 in words is "five hundred twenty-one thousand, four hundred twenty-nine".