429020521 has 2 divisors, whose sum is σ = 429020522. Its totient is φ = 429020520.

The previous prime is 429020477. The next prime is 429020533. The reversal of 429020521 is 125020924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359481600 + 69538921 = 18960^2 + 8339^2 .

It is a cyclic number.

It is not a de Polignac number, because 429020521 - 2⁷ = 429020393 is a prime.

It is a super-2 number, since 2×429020521² = 368117214878222882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (429020821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214510260 + 214510261.

It is an arithmetic number, because the mean of its divisors is an integer number (214510261).

Almost surely, 2^429020521 is an apocalyptic number.

It is an amenable number.

429020521 is a deficient number, since it is larger than the sum of its proper divisors (1).

429020521 is an equidigital number, since it uses as much as digits as its factorization.

429020521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 429020521 is about 20712.8105528921. The cubic root of 429020521 is about 754.2106985975.

The spelling of 429020521 in words is "four hundred twenty-nine million, twenty thousand, five hundred twenty-one".