420719 has 4 divisors (see below), whose sum is σ = 453096. Its totient is φ = 388344.

The previous prime is 420691. The next prime is 420731. The reversal of 420719 is 917024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420719 - 2¹² = 416623 is a prime.

It is a super-2 number, since 2×420719² = 354008953922, 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 = 420694 and 420703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16169 + ... + 16194.

It is an arithmetic number, because the mean of its divisors is an integer number (113274).

2⁴²⁰⁷¹⁹ is an apocalyptic number.

420719 is a deficient number, since it is larger than the sum of its proper divisors (32377).

420719 is a wasteful number, since it uses less digits than its factorization.

420719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32376.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 420719 is about 648.6285531797. The cubic root of 420719 is about 74.9314336308.

The spelling of 420719 in words is "four hundred twenty thousand, seven hundred nineteen".