815834 has 4 divisors (see below), whose sum is σ = 1223754. Its totient is φ = 407916.

The previous prime is 815831. The next prime is 815851. The reversal of 815834 is 438518.

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

It can be written as a sum of positive squares in only one way, i.e., 635209 + 180625 = 797^2 + 425^2 .

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 815797 and 815806.

It is not an unprimeable number, because it can be changed into a prime (815831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203957 + ... + 203960.

2⁸¹⁵⁸³⁴ is an apocalyptic number.

815834 is a deficient number, since it is larger than the sum of its proper divisors (407920).

815834 is a wasteful number, since it uses less digits than its factorization.

815834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407919.

The product of its digits is 3840, while the sum is 29.

The square root of 815834 is about 903.2352960331. The cubic root of 815834 is about 93.4402374824.

It can be divided in two parts, 8158 and 34, that added together give a 13-th power (8192 = 2¹³).

The spelling of 815834 in words is "eight hundred fifteen thousand, eight hundred thirty-four".