420769 has 2 divisors, whose sum is σ = 420770. Its totient is φ = 420768.

The previous prime is 420757. The next prime is 420779. The reversal of 420769 is 967024.

420769 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374544 + 46225 = 612^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 420769 - 2⁵ = 420737 is a prime.

It is a super-2 number, since 2×420769² = 354093102722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210384 + 210385.

It is an arithmetic number, because the mean of its divisors is an integer number (210385).

2⁴²⁰⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

420769 is a deficient number, since it is larger than the sum of its proper divisors (1).

420769 is an equidigital number, since it uses as much as digits as its factorization.

420769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 420769 is about 648.6670948954. The cubic root of 420769 is about 74.9344019012.

The spelling of 420769 in words is "four hundred twenty thousand, seven hundred sixty-nine".