815449 has 4 divisors (see below), whose sum is σ = 835380. Its totient is φ = 795520.

The previous prime is 815431. The next prime is 815453. The reversal of 815449 is 944518.

It is a happy number.

815449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 416025 = 632^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 815449 - 2⁵ = 815417 is a prime.

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 815449.

It is not an unprimeable number, because it can be changed into a prime (815459) 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, 9904 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (208845).

2⁸¹⁵⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

815449 is a deficient number, since it is larger than the sum of its proper divisors (19931).

815449 is a wasteful number, since it uses less digits than its factorization.

815449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19930.

The product of its digits is 5760, while the sum is 31.

The square root of 815449 is about 903.0221481226. The cubic root of 815449 is about 93.4255367174.

The spelling of 815449 in words is "eight hundred fifteen thousand, four hundred forty-nine".