421356029 has 2 divisors, whose sum is σ = 421356030. Its totient is φ = 421356028.

The previous prime is 421356017. The next prime is 421356031. The reversal of 421356029 is 920653124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291623929 + 129732100 = 17077^2 + 11390^2 .

It is a cyclic number.

It is not a de Polignac number, because 421356029 - 2⁸ = 421355773 is a prime.

Together with 421356031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 421355986 and 421356004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421350029) 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, 210678014 + 210678015.

It is an arithmetic number, because the mean of its divisors is an integer number (210678015).

Almost surely, 2^421356029 is an apocalyptic number.

It is an amenable number.

421356029 is a deficient number, since it is larger than the sum of its proper divisors (1).

421356029 is an equidigital number, since it uses as much as digits as its factorization.

421356029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 421356029 is about 20526.9585910821. The cubic root of 421356029 is about 749.6923354369.

The spelling of 421356029 in words is "four hundred twenty-one million, three hundred fifty-six thousand, twenty-nine".