421304029 has 2 divisors, whose sum is σ = 421304030. Its totient is φ = 421304028.

The previous prime is 421304021. The next prime is 421304053. The reversal of 421304029 is 920403124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218241529 + 203062500 = 14773^2 + 14250^2 .

It is a cyclic number.

It is not a de Polignac number, because 421304029 - 2³ = 421304021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421303994 and 421304012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421304021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210652014 + 210652015.

It is an arithmetic number, because the mean of its divisors is an integer number (210652015).

Almost surely, 2^421304029 is an apocalyptic number.

It is an amenable number.

421304029 is a deficient number, since it is larger than the sum of its proper divisors (1).

421304029 is an equidigital number, since it uses as much as digits as its factorization.

421304029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 421304029 is about 20525.6919249998. The cubic root of 421304029 is about 749.6614940561.

The spelling of 421304029 in words is "four hundred twenty-one million, three hundred four thousand, twenty-nine".