815441 has 4 divisors (see below), whose sum is σ = 889584. Its totient is φ = 741300.

The previous prime is 815431. The next prime is 815453. The reversal of 815441 is 144518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815441 is a prime.

It is a super-3 number, since 3×815441³ = 1626667860800433363, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815401) 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, 37055 + ... + 37076.

It is an arithmetic number, because the mean of its divisors is an integer number (222396).

2⁸¹⁵⁴⁴¹ is an apocalyptic number.

It is an amenable number.

815441 is a deficient number, since it is larger than the sum of its proper divisors (74143).

815441 is a wasteful number, since it uses less digits than its factorization.

815441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74142.

The product of its digits is 640, while the sum is 23.

The square root of 815441 is about 903.0177185416. The cubic root of 815441 is about 93.4252311978.

Adding to 815441 its reverse (144518), we get a palindrome (959959).

The spelling of 815441 in words is "eight hundred fifteen thousand, four hundred forty-one".