420819 has 16 divisors (see below), whose sum is σ = 664320. Its totient is φ = 231840.

The previous prime is 420811. The next prime is 420851. The reversal of 420819 is 918024.

It is not a de Polignac number, because 420819 - 2³ = 420811 is a prime.

It is a super-2 number, since 2×420819² = 354177261522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (41520).

2⁴²⁰⁸¹⁹ is an apocalyptic number.

420819 is a deficient number, since it is larger than the sum of its proper divisors (243501).

420819 is a wasteful number, since it uses less digits than its factorization.

420819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 420819 is about 648.7056343211. The cubic root of 420819 is about 74.9373699364.

The spelling of 420819 in words is "four hundred twenty thousand, eight hundred nineteen".