421619 has 4 divisors (see below), whose sum is σ = 459960. Its totient is φ = 383280.

The previous prime is 421609. The next prime is 421621. The reversal of 421619 is 916124.

It is a happy number.

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 421619 - 2¹² = 417523 is a prime.

It is a super-2 number, since 2×421619² = 355525162322, 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 = 421594 and 421603.

It is not an unprimeable number, because it can be changed into a prime (421609) 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, 19154 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (114990).

2⁴²¹⁶¹⁹ is an apocalyptic number.

421619 is a deficient number, since it is larger than the sum of its proper divisors (38341).

421619 is a wasteful number, since it uses less digits than its factorization.

421619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38340.

The product of its digits is 432, while the sum is 23.

The square root of 421619 is about 649.3219540413. The cubic root of 421619 is about 74.9848265601.

It can be divided in two parts, 42 and 1619, that added together give a palindrome (1661).

The spelling of 421619 in words is "four hundred twenty-one thousand, six hundred nineteen".