813026 has 4 divisors (see below), whose sum is σ = 1219542. Its totient is φ = 406512.

The previous prime is 813023. The next prime is 813041. The reversal of 813026 is 620318.

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., 811801 + 1225 = 901^2 + 35^2 .

It is a super-2 number, since 2×813026² = 1322022553352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 812989 and 813007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813023) 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, 203255 + ... + 203258.

2⁸¹³⁰²⁶ is an apocalyptic number.

813026 is a deficient number, since it is larger than the sum of its proper divisors (406516).

813026 is a wasteful number, since it uses less digits than its factorization.

813026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406515.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 813026 is about 901.6795439623. The cubic root of 813026 is about 93.3329109958.

The spelling of 813026 in words is "eight hundred thirteen thousand, twenty-six".