421719 has 8 divisors (see below), whose sum is σ = 595440. Its totient is φ = 264576.

The previous prime is 421717. The next prime is 421727. The reversal of 421719 is 917124.

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

It is not a de Polignac number, because 421719 - 2¹ = 421717 is a prime.

It is a super-2 number, since 2×421719² = 355693829922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421711) 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 7 ways as a sum of consecutive naturals, for example, 4084 + ... + 4185.

It is an arithmetic number, because the mean of its divisors is an integer number (74430).

2⁴²¹⁷¹⁹ is an apocalyptic number.

421719 is a deficient number, since it is larger than the sum of its proper divisors (173721).

421719 is a wasteful number, since it uses less digits than its factorization.

421719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289.

The product of its digits is 504, while the sum is 24.

The square root of 421719 is about 649.3989528787. The cubic root of 421719 is about 74.9907544159.

The spelling of 421719 in words is "four hundred twenty-one thousand, seven hundred nineteen".