419991 has 24 divisors (see below), whose sum is σ = 670320. Its totient is φ = 232320.

The previous prime is 419959. The next prime is 419999. The reversal of 419991 is 199914.

It is not a de Polignac number, because 419991 - 2⁵ = 419959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (419999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4675 + ... + 4763.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2⁴¹⁹⁹⁹¹ is an apocalyptic number.

419991 is a deficient number, since it is larger than the sum of its proper divisors (250329).

419991 is a wasteful number, since it uses less digits than its factorization.

419991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 116 counting only the distinct ones).

The product of its digits is 2916, while the sum is 33.

The square root of 419991 is about 648.0671261528. The cubic root of 419991 is about 74.8881889489. Note that the first 3 decimals are identical.

Adding to 419991 its sum of digits (33), we get a palindrome (420024).

The spelling of 419991 in words is "four hundred nineteen thousand, nine hundred ninety-one".