421132729 has 2 divisors, whose sum is σ = 421132730. Its totient is φ = 421132728.

The previous prime is 421132711. The next prime is 421132757. The reversal of 421132729 is 927231124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410143504 + 10989225 = 20252^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 421132729 - 2⁵ = 421132697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421132729.

It is not a weakly prime, because it can be changed into another prime (421132429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210566364 + 210566365.

It is an arithmetic number, because the mean of its divisors is an integer number (210566365).

Almost surely, 2^421132729 is an apocalyptic number.

It is an amenable number.

421132729 is a deficient number, since it is larger than the sum of its proper divisors (1).

421132729 is an equidigital number, since it uses as much as digits as its factorization.

421132729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 421132729 is about 20521.5186816181. The cubic root of 421132729 is about 749.5598774771.

The spelling of 421132729 in words is "four hundred twenty-one million, one hundred thirty-two thousand, seven hundred twenty-nine".