420019 has 8 divisors (see below), whose sum is σ = 459648. Its totient is φ = 382080.

The previous prime is 420001. The next prime is 420029. The reversal of 420019 is 910024.

420019 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420019 - 2¹⁷ = 288947 is a prime.

It is a super-2 number, since 2×420019² = 352831920722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 419984 and 420011.

It is not an unprimeable number, because it can be changed into a prime (420029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁴²⁰⁰¹⁹ is an apocalyptic number.

420019 is a deficient number, since it is larger than the sum of its proper divisors (39629).

420019 is a wasteful number, since it uses less digits than its factorization.

420019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 420019 is about 648.0887284933. The cubic root of 420019 is about 74.8898531296.

It can be divided in two parts, 4200 and 19, that multiplied together give a triangular number (79800 = T₃₉₉).

The spelling of 420019 in words is "four hundred twenty thousand, nineteen".