421519 has 4 divisors (see below), whose sum is σ = 481744. Its totient is φ = 361296.

The previous prime is 421517. The next prime is 421559. The reversal of 421519 is 915124.

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 421519 - 2¹ = 421517 is a prime.

It is a super-2 number, since 2×421519² = 355356534722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30102 + ... + 30115.

It is an arithmetic number, because the mean of its divisors is an integer number (120436).

2⁴²¹⁵¹⁹ is an apocalyptic number.

421519 is a deficient number, since it is larger than the sum of its proper divisors (60225).

421519 is an equidigital number, since it uses as much as digits as its factorization.

421519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60224.

The product of its digits is 360, while the sum is 22.

The square root of 421519 is about 649.2449460720. The cubic root of 421519 is about 74.9788977669.

The spelling of 421519 in words is "four hundred twenty-one thousand, five hundred nineteen".