819401 has 8 divisors (see below), whose sum is σ = 901344. Its totient is φ = 738720.

The previous prime is 819391. The next prime is 819407. The reversal of 819401 is 104918.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (819407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (112668).

2⁸¹⁹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

819401 is a deficient number, since it is larger than the sum of its proper divisors (81943).

819401 is a wasteful number, since it uses less digits than its factorization.

819401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 819401 is about 905.2077109703. The cubic root of 819401 is about 93.5762196997.

The spelling of 819401 in words is "eight hundred nineteen thousand, four hundred one".