420929 has 2 divisors, whose sum is σ = 420930. Its totient is φ = 420928.

The previous prime is 420919. The next prime is 420941. The reversal of 420929 is 929024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297025 + 123904 = 545^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 420929 - 2¹² = 416833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420898 and 420907.

It is not a weakly prime, because it can be changed into another prime (420919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210464 + 210465.

It is an arithmetic number, because the mean of its divisors is an integer number (210465).

2⁴²⁰⁹²⁹ is an apocalyptic number.

It is an amenable number.

420929 is a deficient number, since it is larger than the sum of its proper divisors (1).

420929 is an equidigital number, since it uses as much as digits as its factorization.

420929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 420929 is about 648.7904129995. The cubic root of 420929 is about 74.9438987866.

Subtracting from 420929 its sum of digits (26), we obtain a triangular number (420903 = T₉₁₇).

The spelling of 420929 in words is "four hundred twenty thousand, nine hundred twenty-nine".